Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
truong va » truong dai, truong cao, truong dao
doc hieu » toc thieu, hoc thieu
trung va » trang va, trung ha, trung tam
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) manh - thanh ((trung va) or (truong va)) nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - thanh ((trung va) OR (truong va)) nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - thanh ((trung va) or (truong va)) nhung cong dan toan cao*.