Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
xuc va » duc va, tuc va, luc va
va dau » va dao
dau du » dau tu, day du, dao du
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((y nang) OR (v nang)) xa hoi. hieu va cam xuc va dau du ((cuu tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (v nang)) xa hoi. hieu va cam xuc va dau du ((cuu tre) OR (cau triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) OR (v nang)) xa hoi. hieu va cam xuc va dau du ((cuu tre) or (cau triet))*".