Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
dinh cuu » dinh chi
thu sach » tu sach, thuat sach, thuoc sach
vinh cuu » sinh cua, dinh cu, tinh cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
dai xuc » dai xu, dai luoc, dai thuc
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va

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