Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
mai hoi » mai khoi, dai hoi, lai hoi
nam xuc » cam xuc, nam xua, nam thuc
ky tang » ky nang, ky dang, ky trong
hanh va » hang va, hanh vi
xuc va » duc va, tuc va, luc va
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) OR (kho tang)) mai hoi. hieu van nam xuc va ((hanh vai) or (hanh va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (kho tang)) mai hoi. hieu van nam xuc va ((hanh vai) OR (hanh va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) OR (kho tang)) mai hoi. hieu van nam xuc va ((hanh vai) or (hanh va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) OR (kho tang)) mai hoi. hieu van nam xuc va ((hanh vai) or (hanh va)) cua triet*.