Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
cong thanh » dong thanh, cong trinh, cong tan
dung cong » dung trong
thanh ban » thanh san, thanh van, thanh bac
ho chieu » hoc thieu, doi chieu, mot chieu
nang dua » nang suat, nang quan, nang luc
nang du » nang tu, nang luc, nang doc
ban cau » bang cau, ban can, van cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - anh ((nang dua) OR (nang du)) dung cong thanh ban cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) xanh - anh ((nang dua) OR (nang du)) dung cong thanh ban cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) xanh - anh ((nang dua) OR (nang du)) dung cong thanh ban cau*.