Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
lang van » dang van, tang van, hoang van
hai cua » thai cua, dai cua, hoi cua
anh hai » lanh hai, manh hai, anh thai
ban anh » ban hanh, ban banh, ban danh
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
cua tre » cua te, cuu tre, cua triet

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) OR (thuoc sach)) ty ((nang x) or (lang van)) hoi. hieu qua cac xuc ban anh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ty ((nang x) OR (lang van)) hoi. hieu qua cac xuc ban anh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ty ((nang x) or (lang van)) hoi. hieu qua cac xuc ban anh hai cua tre*".