Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
duong van » duong va, luong va, dang van
hoc hieu » hoc thieu, hoc hien, doc hieu
trang ha » trang va, trung ha, tang ha
cong van » cong vang, cong san, song van
toan ban » van ban
tang he » tang le, tang ha, bang he

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 - hanh ((trang ha) or (tang he)) trong ((cong van) or (duong van)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trang ha) OR (tang he)) trong ((cong van) OR (duong van)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trang ha) or (tang he)) trong ((cong van) or (duong van)) toan ban*.