Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
danh vai » danh sai, danh va, doanh van
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac ly » cac ky, cac le, cam ly
y nang » ky nang, ly nang, v nang

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 van cac 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 van cac 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 van cac ly va danh vai ((cua tre) or (va triet))*.