Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
he chieu » ho chieu, he nhieu, theo chieu
phan van » pham van, thanh van, luan van
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: he chieu sang - thanh tung ((cua thong) or (cua khong)) phan van ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he chieu sang - thanh tung ((cua thong) OR (cua khong)) phan van ban can*.