Perhaps you should try some spelling variations:
hoc thieu » hoc hien
dung cong » dung trong
van thanh » ban thanh, van tuan
thanh bac » nhanh bac, thanh bai, thanh san
van hanh » ban hanh, van anh, van ban
cong van » cong vang, cong san, song van
hanh va » hang va, hanh vi
va dung » van dung, va duong, vat dung

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) or (toc thieu)) manh - van hanh va dung cong van thanh bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) manh - van hanh va dung cong van thanh bac.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) manh - van hanh va dung cong van thanh bac*.