Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
thang cua » thong cua, hang cua, than cua
trong san » trong cac, dong san, trong ca
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
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 hieu manh - hanh ((thang cua) or (tang cua)) dung ((trong san) OR (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((thang cua) OR (tang cua)) dung ((trong san) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((thang cua) or (tang cua)) dung ((trong san) OR (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((thang cua) or (tang cua)) dung ((trong san) OR (cong san)) toan ban*.