Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
va tinh » may tinh
hai cua » thai cua, hoi cua, lai cua
cac tu » cac thu, cach tu, cac du

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 ly nang xa hoi. hieu vien cac tu ((va hanh) or (va tinh)) ((hai cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang xa hoi. hieu vien cac tu ((va hanh) OR (va tinh)) ((hai cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang xa hoi. hieu vien cac tu ((va hanh) or (va tinh)) ((hai cua) or (dai cua)) triet*.