Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
vai cua » dai cua, hai cua, lai cua
ve cac » va cac, vien cac
tac va » tac da, tac xa, tuc va
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ty nang) or (ky nang)) xa hoi. hieu ve cac tac va thanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cac tac va thanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) or (ky nang)) xa hoi. hieu ve cac tac va thanh ((vi cua) or (vai cua)) triet*.