Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
trung ha » trung hoc, trung tam, trung cap
cong tac » cong ty
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
ha lang » hoa lang, ha tang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung ha lang ((huong dan) or (cong tac)) ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung ha lang ((huong dan) OR (cong tac)) ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung ha lang ((huong dan) or (cong tac)) ((toan tai) or (toan ban))*.