Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
hanh dai » hanh tai, hanh dao, vanh dai
thu sach » thuat sach, thuoc sach, thu hoach
vien cac » vien bach, vien dai, vien da
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ly nang xa hoi. hieu vien cac luc va hanh dai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang xa hoi. hieu vien cac luc va hanh dai ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ly nang xa hoi. hieu vien cac luc va hanh dai ((cua te) or (cua tu))*.