Perhaps you should try some spelling variations:
hang vai » hang va, hang tai, hang hai
ban hang » ngan hang
tu sach » thu sach, te sach, tu cach
van hac » van hoc, van ha, van hai
vai cuu » vai cua
duc ban » duc tan, duc van, dua ban
van cac » van cau, van bac, dan cac
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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 (su sach)) ky nang x hoi. hieu ((van cac) OR (van hac)) duc ban hang vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu ((van cac) OR (van hac)) duc ban hang vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. hieu ((van cac) OR (van hac)) duc ban hang vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu ((van cac) OR (van hac)) duc ban hang vai cuu tre*.