Perhaps you should try some spelling variations:
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
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
he va » che va, he van, te 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 ve cac he va doanh va ((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 ve cac he va doanh va ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve cac he va doanh va ((cua tre) or (va triet))*.