Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, le thanh
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
ky tang » ky nang, ky dang, kho tang
van lam » van nam
ky sang » ky nang, ky dang, duy sang
va tinh » may tinh
ha cua » hoa cua, hai cua, nha cua
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ky sang) OR (ky tang)) xa hoi. hieu van lam duoc ((va thanh) or (va tinh)) ha cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky sang) OR (ky tang)) xa hoi. hieu van lam duoc ((va thanh) OR (va tinh)) ha cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky sang) OR (ky tang)) xa hoi. hieu van lam duoc ((va thanh) or (va tinh)) ha cua triet".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky sang) OR (ky tang)) xa hoi. hieu van lam duoc ((va thanh) or (va tinh)) ha cua triet*.