Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung dung » phuong dung, ung dung, thong dung
doi chieu » doc hieu, doi chi, ho chieu
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh toan
trang va » hang va
tran van » luan van
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 chieu sang - hanh ((trang va) or (tran van)) nhung dung manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((trang va) OR (tran van)) nhung dung manh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh ((trang va) or (tran van)) nhung dung manh toan ban*.