Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
ban hang » ngan hang
hang vai » hang va, hang tai, hang hai
tu sach » thu sach, su sach, te sach
vu sach » vu bach, su sach
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
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 (((vu sach) OR (vu khach)))) ky nang x hoi. hieu ve cac duc ban hang vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((vu sach) OR (vu khach)))) ky nang x hoi. hieu ve cac duc ban hang vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((vu sach) OR (vu khach)))) ky nang x hoi. hieu ve cac duc ban hang vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((vu sach) OR (vu khach)))) ky nang x hoi. hieu ve cac duc ban hang vai cuu tre*.