Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
trang ha » trang va, tang ha, trang cham
trung ha » trung hoc, trung tam, trung cap
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: hoc hieu manh - hanh ((trang ha) or (trung ha)) trong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trang ha) OR (trung ha)) trong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trang ha) or (trung ha)) trong cong dan toan cao*.