Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
nang cay » nang cao, nang cap, nang cai
cay phoi » cap phoi, tay hoi, cay cho
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » su sach, te sach, tu cach
van anh » van thanh, tuan anh, van minh
vai cua » dai cua, hai cua, lai cua
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
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 (thu sach)) ky nang cay phoi. hieu van cac xuc ((van anh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang cay phoi. hieu van cac xuc ((van anh) OR (ban hanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang cay phoi. hieu van cac xuc ((van anh) or (ban hanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang cay phoi. hieu van cac xuc ((van anh) or (ban hanh)) vai cua tre*.