Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
canh doanh » hanh doanh, chinh doanh, doanh doanh
hieu xanh » chieu xanh, hieu manh, hieu nganh
nhan dung » nhan dang, ngan dung, nha dung
chan dung » van dung, dan dung
doc hieu » toc thieu, hoc thieu, hoc hien
pham tai » pham thi, pham van
pham tu » phan tu, pham thi, pham duc

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 xanh - canh doanh ((nhan dung) OR (chan dung)) cong thanh ((pham tu) or (pham tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh doanh ((nhan dung) OR (chan dung)) cong thanh ((pham tu) OR (pham tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - canh doanh ((nhan dung) OR (chan dung)) cong thanh ((pham tu) or (pham tai))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh doanh ((nhan dung) OR (chan dung)) cong thanh ((pham tu) or (pham tai))*.