One automatic Thai query expansion was reported in [17].
The method was replied on corpus-specific technique where
LEXiTRON Thai-English dictionary included synonym, related
terms and translate term was utilises. The correlation of
terms was constructed in order to expand new queries. In the
network, each individual word was connected to other words
by synonym and related relationships. Candidate terms were
later merged to create new query and put back to retrieval
system. Their work evaluated on web collection. The idea of
this work is comparable to the method using Wordnet found
in many English QEs. However, their expanded words always
include similar words in same context which can not capture
other several topics or user contexts. The diversity of topics
is for example, “apple”may refer to two different contexts –
“fruit”or “computer brand”. People may interest to find detail
of apple computer rather than fruit.