Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tung » thanh cong
hanh dong » anh dong
doc hieu » toc thieu, hoc thieu, hoc hien
tung cap » trung cap, cung cap, thong cap
phan dau » hang dau
ha dong » hoat dong, van dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu nganh - thanh tung cap ((hanh dong) OR (ha dong)) san ((phan tu) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - thanh tung cap ((hanh dong) OR (ha dong)) san ((phan tu) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - thanh tung cap ((hanh dong) OR (ha dong)) san ((phan tu) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh tung cap ((hanh dong) OR (ha dong)) san ((phan tu) or (phan dau))*.