Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh tinh » canh tranh, nhanh tinh, thanh tinh
manh tinh » man tinh, manh binh, nhanh tinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hoc hieu » hoc thieu, hoc hien, doc hieu
va trong » va truong, va thong, va tuong
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan lap » phan dau

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 tinh) or (((manh tinh) or (hanh tinh)))) va trong cong tac phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((canh tinh) OR (((manh tinh) OR (hanh tinh)))) va trong cong tac phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((canh tinh) or (((manh tinh) or (hanh tinh)))) va trong cong tac phan lap*.