Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
va triet » va thiet, va trien, ve triet
danh vai » danh sai, danh va, doanh van
vien cam » vien cac, vien cao, vien nam
thu sach » thuat sach, thuoc sach, thu hoach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
tu sach » su sach, te sach, tu cach
y nang » ky nang, ly nang, v nang
cam ly » tam ly, cam ky, cam lo

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)) y nang xa hoi. hieu vien cam ly va danh vai ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. hieu vien cam ly va danh vai ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang xa hoi. hieu vien cam ly va danh vai ((cua tre) or (va triet))*.