Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hang tai » hang va, dung tai
cam tuc » cam xuc, cam tu, dam thuc
tai cua » thai cua, tai cuc, tri cua
xa hang » va hang, xa bang, xa hung
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach ty, sach hay
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, hang ca
sach lo » sach dao, sach doi, sach hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ly) or (sach lo)) hang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) xa hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach lo)) hang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) xa hang tai 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 ve ((cam tuc) OR (nam thuc)) xa hang tai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach lo)) hang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) xa hang tai cua tre*.