Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thu hoach
tay lang » tai lang, tay tang, tay quang
hieu va » lieu va, hieu qua
cam dua » ca dua, cay dua, chay dua
dua ban » dia ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
y lang » o lang, _ lang, yen lang

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)) ((y lang) OR (tay lang)) xa hoi. hieu va cam dua ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ((y lang) OR (tay lang)) xa hoi. hieu va cam dua ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ((y lang) OR (tay lang)) xa hoi. hieu va cam dua ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ((y lang) OR (tay lang)) xa hoi. hieu va cam dua ban thanh vai cua tre*.