Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
ty nang » ty xang, ty hang, ly nang
cac tac » cac toc, cac bac, cac dac
vai cua » dai cua, hai cua, lai cua
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 vien 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 vien cac tac va thanh ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty nang) OR (ky nang)) xa hoi. hieu vien 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 vien cac tac va thanh ((vi cua) or (vai cua)) triet*.