Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien anh)) - canh trinh va dung cong tan ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - canh trinh va dung cong tan ((phan dau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - canh trinh va dung cong tan ((phan dau) or (phan cac))*.