Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
gian thanh » gia thanh, ban thanh, van thanh
doi chieu » doc hieu, doi chi, mot chieu
hanh dung » thanh dung, anh dung, hanh dong
dung gian » duong gian, dung giao, dung giam
thanh dan » thanh san, thanh van, thanh dat
lluan van » luan va, luan von, quan van
dan van » dang van, doan van, dao van

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 dung gian thanh dan van ((luan van) or (lluan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh dung gian thanh dan van ((luan van) OR (lluan van)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh dung gian thanh dan van ((luan van) or (lluan van))*.