Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
va dau » va dao
dau du » dau tu, day du, dao du

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: toc sach y nang xa hoi. hieu va cac tuc va dau du ((cau tren) OR (cua triet))~.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu va cac tuc va dau du ((cau tren) or (cua triet))*.