Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tan tuan » tran tuan, than tuan, van tuan
sach ty » sach y, sach tu, sach thu
sach uu » sach luu, sach tu, sach xu
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
tuan vi » quan vi, luan vi, quans vi
su viet » so viet
vi su » va su, ve su, ki su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach uu)) nang xa hoi. hieu van cam duc tan tuan vi su viet~.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach uu)) nang xa hoi. hieu van cam duc tan tuan vi su viet*.