Perhaps you should try some spelling variations:
ban hang » ngan hang
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, ma hoa, me hoi
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cam xuc ((ban hanh) OR (ban hang)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc ((ban hanh) OR (ban hang)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cam xuc ((ban hanh) OR (ban hang)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((ma hoi) or (xa hoi)). hieu ve cam xuc ((ban hanh) OR (ban hang)) vi cua tu*.