Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
nham thuc » nam thuc, nham thu, pham thuc
xa hang » va hang, xa bang, xa hung
hieu vu » hieu va, hieu ve, hieu su
sach ly » sach y, sach ty, sach hay
hang xa » hoang xa, hang ca, lang xa
sach lo » sach dao, sach doi, sach hoi
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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: su ((sach ly) OR (sach lo)) hang xa hoi. hieu vu ((nham thuc) OR (nhan thuc)) xa hang va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) or (sach lo)) hang xa hoi. hieu vu ((nham thuc) OR (nhan thuc)) xa hang va cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach lo)) hang xa hoi. hieu vu ((nham thuc) OR (nhan thuc)) xa hang va cua tre*.