Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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 ky lang xa hoi. hieu vien cac xuc ((va hanh) or (gia thanh)) ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu vien cac xuc ((va hanh) OR (gia thanh)) ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu vien cac xuc ((va hanh) or (gia thanh)) ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu vien cac xuc ((va hanh) or (gia thanh)) ((vi cua) OR (vai cua)) tre*.