Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh de » hanh de, thanh ve, thanh do
va thanh » gia thanh, ban thanh, va tinh
toc sach » hoc sach, doc sach, thuoc sach
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
cam luc » cau luc
y nang » ky nang, v nang, may nang
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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 (ly nang)) x hoi. hieu va ((cam luc) or (cam xuc)) va thanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (ly nang)) x hoi. hieu va ((cam luc) OR (cam xuc)) va thanh de cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) OR (ly nang)) x hoi. hieu va ((cam luc) or (cam xuc)) va thanh de cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) OR (ly nang)) x hoi. hieu va ((cam luc) or (cam xuc)) va thanh de cua triet*.