Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cham tuc » nham thuc, pham thuc, tham thuc
cua tre » cua te, cuu tre, cua triet
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua cu

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