Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hieu van » hieu va, thien van, lieu va
lanh hai » manh hai, thanh hai, lang chai
danh hai » dang hai, manh hai, danh hau
cam tuc » cam xuc, cam tu, nam thuc
so sach » so sanh, bo sach, co sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly nang ((ma hoi) or (xa hoi)). hieu van cam tuc va ((danh hai) OR (lanh hai)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly nang ((ma hoi) OR (xa hoi)). hieu van cam tuc va ((danh hai) OR (lanh hai)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ly nang ((ma hoi) or (xa hoi)). hieu van cam tuc va ((danh hai) OR (lanh hai)) cau triet".
• Adding a wildcard symbol may retrieve word variants: so sach ly nang ((ma hoi) or (xa hoi)). hieu van cam tuc va ((danh hai) OR (lanh hai)) cau triet*.