Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, te sach, tu cach
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa

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 (su sach)) ky tang ma hoi. ((hieu ve) OR (hieu va)) cham xuc ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky tang ma hoi. ((hieu ve) OR (hieu va)) cham xuc ban thanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky tang ma hoi. ((hieu ve) OR (hieu va)) cham xuc ban thanh vai cua tre*".