Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van lam, van cau
vi cua » vai cua, di cua
de cua » le cua, te cua, dieu cua
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 ty nang x hoi. hieu van cam xuc ((ban hanh) OR (ban hang)) ((vi cua) or (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van cam xuc ((ban hanh) OR (ban hang)) ((vi cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van cam xuc ((ban hanh) OR (ban hang)) ((vi cua) or (de cua)) tre*".