Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
cac khoi » cac thoi, cac khoan, cach thoi
mai hoi » mai khoi, dai hoi, lai hoi
sac kho » suc khoe, dac khoa, cac khoa
van lam » van nam
lam xuc » cam xuc, lam duoc
hanh va » hang va
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 ((sac kho) OR (cac khoi)) tang mai hoi. hieu van lam xuc va ((hanh vi) or (hanh va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac kho) OR (cac khoi)) tang mai hoi. hieu van lam xuc va ((hanh vi) OR (hanh va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac kho) OR (cac khoi)) tang mai hoi. hieu van lam xuc va ((hanh vi) or (hanh va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sac kho) OR (cac khoi)) tang mai hoi. hieu van lam xuc va ((hanh vi) or (hanh va)) cua triet*.