Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
hieu xanh » chieu xanh, hieu manh, hieu nganh
quy trong » luy trong, thuy trong, quy trinh
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
tang quy » tan quy, nang quy, tang quan
cong tan » cong tac, cong san, cong ty
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: doc hieu xanh - anh tang quy trong ((cong tan) or (cong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - anh tang quy trong ((cong tan) OR (cong thanh)) toan ban*.