Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cau tren » cu tren, dau tren, ca tren
vien cac » vien bach, vien dai, vien da
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » vu sach
cao hoi » cau hoi, co hoi, cao hoc
so sach » so sanh, bo sach, co sach
cac xuc » cam xuc, cac nuoc, chat xuc
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang cao hoi. hieu vien cac xuc ((va hanh) or (va danh)) va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang cao hoi. hieu vien cac xuc ((va hanh) OR (va danh)) va cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang cao hoi. hieu vien cac xuc ((va hanh) or (va danh)) va cau tren*.