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

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