Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
su sach » so sach, vu sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
tu xa » tu xay, tu va, tu ma
te xa » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) xa hoi. hieu van chat ((tu xa) or (te xa)) hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu van chat ((tu xa) OR (te xa)) hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) xa hoi. hieu van chat ((tu xa) or (te xa)) hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) xa hoi. hieu van chat ((tu xa) or (te xa)) hanh dai cua triet*.