Perhaps you should try some spelling variations:
thanh dang » thanh hang, thanh dan, thanh dong
giay thanh » gia thanh, gian thanh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dong » anh dong, ha dong
dong giay » dong giao, dong giam, duong giao
lluan van » luan va, luan von, quan van
doi hieu » doi chieu, doc hieu, doi hien
dang van » hoang van, hang va

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 - hanh dong giay thanh dang van ((luan van) or (lluan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh dong giay thanh dang van ((luan van) OR (lluan van)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh dong giay thanh dang van ((luan van) or (lluan van))*.