Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
truong cao » truong dai
hang cong » dang cong, hang nong, bang cong
hoc dieu » hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu hanh - hanh ((truong quan) or (truong cao)) hang cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - hanh ((truong quan) OR (truong cao)) hang cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh ((truong quan) or (truong cao)) hang cong dan than cao*.