Perhaps you should try some spelling variations:
suat phong » suat thong, xuat phuong, suot phuong
phong cong » phong chong, thong cong, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
anh nang » ganh nang, anh bang, anh dang
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
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: doi hieu lang - anh nang suat phong cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - anh nang suat phong cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - anh nang suat phong cong tan ((toan cao) or (toan ban))*.