Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien dai » hien dai
va doanh » van doanh, vay doanh, va danh
doanh va » doan va, doanh tai, doanh cua
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
dai bao » dam bao, da bao, tai bao
bao va » bao ve, tao va, ban va
va va » va van, va vua, va vai

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 (vu sach)) ky nang xa hoi. hieu vien dai bao va doanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang xa hoi. hieu vien dai bao va doanh va va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang xa hoi. hieu vien dai bao va doanh va va triet*.