Perhaps you should try some spelling variations:
ban hang » ngan hang
chat duc » chat xuc, chat doc, chet duoc
tu sach » thu sach, su sach, te sach
ky tang » ky dang, kho tang, ky trong
man hoi » man hoai, dan hoi, van hoi
hieu va » lieu va
hang vi » hang va, hanh vi, hang di
duc ban » duc tan, duc van, dua ban
vi cua » vai cua, di cua
cua te » cua tu

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 ((ky tang) OR (ky nang)) man hoi. ((hieu va) or (hieu qua)) chat duc ban hang vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky nang)) man hoi. ((hieu va) OR (hieu qua)) chat duc ban hang vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) OR (ky nang)) man hoi. ((hieu va) or (hieu qua)) chat duc ban hang vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) OR (ky nang)) man hoi. ((hieu va) or (hieu qua)) chat duc ban hang vi cua te*.