Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
toan thanh » tran thanh, hoan thanh, toan thang
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
tan thanh » tran thanh, tang thanh, ban thanh
ban cong » bang cong, van cong, phan cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - hanh tranh cua ban cong ((tan thanh) or (toan thanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh tranh cua ban cong ((tan thanh) OR (toan thanh)) cap*.