Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
va hang » van hang, va nang, va lang

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 manh - ((canh trinh) or (hanh tinh)) va hang cong tan ((phan cau) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((canh trinh) OR (hanh tinh)) va hang cong tan ((phan cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((canh trinh) or (hanh tinh)) va hang cong tan ((phan cau) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((canh trinh) or (hanh tinh)) va hang cong tan ((phan cau) OR (phan dau))*.