Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
vanh dai » vanh tai, lanh dao, van dao
tu sach » thu sach, su sach, te sach
van hau » van ha, van hai, van dau
hau xuc » chat xuc
van dai » van dao, van hai, can dai
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
xuc va » duc va, tuc va, luc va

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: tu sach ((y nang) OR (v nang)) xa hoi. hieu van hau xuc va ((vanh dai) OR (van dai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) xa hoi. hieu van hau xuc va ((vanh dai) OR (van dai)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. hieu van hau xuc va ((vanh dai) OR (van dai)) cua triet*.