Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
thu sach » thuat sach, thuoc sach, thu hoach
ban hang » ngan hang
hang tai » hang va, dung tai
van hanh » van thanh, ban hanh, van anh
tu sach » su sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
tai hoa » tai khoa, thai hoa, thi hoa
ky hang » ky nang, ly hang, ky dang
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 hang tai hoa. hieu ve chat xuc ((van hanh) or (ban hang)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky hang tai hoa. hieu ve chat xuc ((van hanh) OR (ban hang)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky hang tai hoa. hieu ve chat xuc ((van hanh) or (ban hang)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky hang tai hoa. hieu ve chat xuc ((van hanh) or (ban hang)) vai cua tre*.