Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thong cua » thong quan, huong cua
tong cong » trong cong, cong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
thong va » truong va, thong qua, thong xay
thong tu » phong tuc, thong tin, thong ke
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 nganh - thanh ((thong va) or (((thong cua) OR (thong tu)))) tong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - thanh ((thong va) OR (((thong cua) OR (thong tu)))) tong cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - thanh ((thong va) or (((thong cua) OR (thong tu)))) tong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - thanh ((thong va) or (((thong cua) OR (thong tu)))) tong cong dan toan cao*.