Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
nang mai » nang ma, nang tai, lang mai
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai cua
dua ban » dia ban, cua ban, qua ban
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
te sach » toc sach
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: ((tu sach) OR (te sach)) ky nang mai hoi. ((hieu ve) or (lieu va)) chay dua ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang mai hoi. ((hieu ve) OR (lieu va)) chay dua ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang mai hoi. ((hieu ve) or (lieu va)) chay dua ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang mai hoi. ((hieu ve) or (lieu va)) chay dua ban thanh vai cua tre*.