Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
vu khach » vu khanh, vu khac, vay khach
cac xuc » cam xuc, cac nuoc, chat xuc
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, va dan, va hanh
vu sach » vu bach, su sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet

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) OR (vu khach)) ky lang xa hoi. hieu vien cac xuc ((va danh) or (gia thanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu vien cac xuc ((va danh) OR (gia thanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ky lang xa hoi. hieu vien cac xuc ((va danh) or (gia thanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ky lang xa hoi. hieu vien cac xuc ((va danh) or (gia thanh)) hai cua tre*.