Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh lai » thanh hai, thanh lap, thanh loi
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xac va » tac va, ac va, bac va

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 (thuat sach)) ty nang ma hoi. hieu va cam ((xac va) or (duc va)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ty nang ma hoi. hieu va cam ((xac va) OR (duc va)) thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ty nang ma hoi. hieu va cam ((xac va) or (duc va)) thanh lai cua tre*.