Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
vi cua » di cua
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu ve cac xuc ((ban hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang o hoi. hieu ve cac xuc ((ban hanh) OR (va thanh)) ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hoi. hieu ve cac xuc ((ban hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hoi. hieu ve cac xuc ((ban hanh) or (va thanh)) ((vi cua) OR (vai cua)) triet*.