Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
khach ky » hanh ky, thanh ky
bach xuc » bach tuoc, bach xuan, bach hue
nang xa » lang xa, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai 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: vay khach ky ((nang xa) OR (nang x)) hoi. hieu vien bach xuc ((va hanh) or (gia thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vay khach ky ((nang xa) OR (nang x)) hoi. hieu vien bach xuc ((va hanh) OR (gia thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vay khach ky ((nang xa) OR (nang x)) hoi. hieu vien bach xuc ((va hanh) or (gia thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vay khach ky ((nang xa) OR (nang x)) hoi. hieu vien bach xuc ((va hanh) or (gia thanh)) vi cua tre*.