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
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
dan du » dan dau, danh du, dan su

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 (ky nang)) xa hoi. hieu va cam tuc va dan du ((cuu tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (ky nang)) xa hoi. hieu va cam tuc va dan du ((cuu tre) OR (cau triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) OR (ky nang)) xa hoi. hieu va cam tuc va dan du ((cuu tre) or (cau triet))*".