Perhaps you should try some spelling variations:
thang luan » tang luan, hang luan, thong luan
minh thang » minh hang, minh trang, dinh thang
dung dat » dung va, dung tai
bao hieu » bao nhieu, cao hieu, bao hiem
dat bao » dam bao, da bao, tat bao
luan va » luan van, luat va
va hien » van hien, va lien, va dien
hien so » khien so, bien so, hieu so
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung dat bao hieu qua ) or ( minh thang luan va hien so ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung dat bao hieu qua ) OR ( minh thang luan va hien so ))*.