Perhaps you should try some spelling variations:
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
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: tu sach ((y nang) or (v nang)) mai hoi. hieu ve cam luc ((ban hanh) OR (ban hang)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) mai hoi. hieu ve cam luc ((ban hanh) OR (ban hang)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) mai hoi. hieu ve cam luc ((ban hanh) OR (ban hang)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) mai hoi. hieu ve cam luc ((ban hanh) OR (ban hang)) vi cua tu*.