Perhaps you should try some spelling variations:
toan thanh » tran thanh, hoan thanh, toan thang
thuoc toan » thuoc tan, thuoc thanh, thuat toan
cam thuoc » cay thuoc, nam thuoc, lam thuoc
thanh vai » thanh hai, thanh van, thanh tai
vu khach » vu khanh, vu khac, vay khach
thu sach » tu sach, thuat sach, thuoc sach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (thu sach)) ky tang ma hoi. lieu va cam thuoc toan thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (thu sach)) ky tang ma hoi. lieu va cam thuoc toan thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (thu sach)) ky tang ma hoi. lieu va cam thuoc toan thanh vai cua tre*.