Perhaps you should try some spelling variations:
truong dao » truong dai, truong cao
hieu lang » chieu sang, hieu quang, nhieu tang
truong bo » truong cao
nong tac » cong tac, dong tac, tuong tac
nong tan » cong tan, nong dan, nong san
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh ((truong dao) or (truong bo)) hang ((nong tac) OR (nong tan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((truong dao) OR (truong bo)) hang ((nong tac) OR (nong tan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh ((truong dao) or (truong bo)) hang ((nong tac) OR (nong tan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((truong dao) or (truong bo)) hang ((nong tac) OR (nong tan)) toan tap*.