Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
vinh cuu » dinh cuu, sinh cua, dinh cu
su sach » so sach, vu sach
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
dai xuc » dai xu, dai luoc, dai thuc
nang xa » nang x, lang xa, nang ma
tu cach » tu cac
cuu tre » cua tre, cau tren, cau treo

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 (tu cach)) ky nang xa hoi. hieu vien dai xuc ((va hanh) OR (va danh)) vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (tu cach)) ky nang xa hoi. hieu vien dai xuc ((va hanh) OR (va danh)) vinh cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (tu cach)) ky nang xa hoi. hieu vien dai xuc ((va hanh) OR (va danh)) vinh cuu tre*".