Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh dao » lanh dao, thanh dat, thanh dam
hanh dai » hanh tai, vanh dai, thanh dat
lam xuc » cam xuc, lam duoc
su sach » vu sach
ly hang » ly quang
so sach » so sanh, bo sach, co sach
van lam » van nam
va hoi » xa hoi, va hoc, va hoa
xuc va » duc va, tuc va, luc 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) or (so sach)) ly hang va hoi. hieu van lam xuc va ((hanh dai) OR (hanh dao)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly hang va hoi. hieu van lam xuc va ((hanh dai) OR (hanh dao)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ly hang va hoi. hieu van lam xuc va ((hanh dai) OR (hanh dao)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ly hang va hoi. hieu van lam xuc va ((hanh dai) OR (hanh dao)) cua triet*.