Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
khung cong » nhung cong, khung long, phung cong
hoc thieu » toc thieu, hoc hien
huong dai » huong dan, huong doi, duong dai
dai khung » dai khong, dam khung, dai khoang
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu manh - anh huong dai khung cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - anh huong dai khung cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - anh huong dai khung cong tan ((toan cao) or (toan ban))*.