Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
chat xuc » chat huu, cam xuc, chao xu
ban hanh » ban hang
tu sach » su sach, te sach, tu cach
cao hoa » cao hoat, cao khoa, cau hoa
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va tinh » may tinh
vai cua » dai cua, hai cua, lai cua
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 cao hoa. hieu va chat xuc ((va tinh) 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 cao hoa. hieu va chat xuc ((va tinh) OR (ban hanh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang cao hoa. hieu va chat xuc ((va tinh) or (ban hanh)) vai cua tre*.