Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
hieu quan » hieu qua, lieu quan, thien quan
thanh lai » thanh hai, thanh lap, thanh loi
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
quan nam » quang nam, xuan nam, quan am
nam thuc » nam thuoc, am thuc, nam thu
thuc dat » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
lai cua » dai cua, hai cua, lai chau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((thu nang) or (thu hang)) xa hoi. hieu quan nam thuc dat thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (thu hang)) xa hoi. hieu quan nam thuc dat thanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ((thu nang) or (thu hang)) xa hoi. hieu quan nam thuc dat thanh lai cua te*.