Perhaps you should try some spelling variations:
sach ty » sach tu, sach thu, xach tay
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
van dai » vanh dai, van dao, van hai
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, tuc va, luc va
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) or (sach y)) nang x hoi. hieu qua cac xuc va van dai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach y)) nang x hoi. hieu qua cac xuc va van dai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) or (sach y)) nang x hoi. hieu qua cac xuc va van dai ((cua tre) OR (cua te))*".