Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » thuat sach, thuoc sach, thu hoach
nang tay » nang tai, nang tao, bang tay
tu sach » su sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
tuc va » thuc va, tuc xa, duc va
ve cam » ve cham, ve cac, va cam

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