Perhaps you should try some spelling variations:
te sach » toc sach
va dinh » van dinh, va tinh, vu dinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cao duc, cac dac, cac nuoc
va kinh » va tinh, qua kinh
vi cua » vai cua, di cua
cua te » cua tu
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu ve ((cac duc) OR (cac du)) ((va dinh) OR (va kinh)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu ve ((cac duc) or (cac du)) ((va dinh) OR (va kinh)) vi cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu ve ((cac duc) or (cac du)) ((va dinh) OR (va kinh)) vi cua te*.