Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
dinh vi » dinh ve, dinh viet, dinh tri
ma hoi » mai hoi, xa hoi, me hoi
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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 ky nang ((ma hoi) OR (ma hoa)). hieu va cam tuc va ((hanh vi) or (dinh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (ma hoa)). hieu va cam tuc va ((hanh vi) OR (dinh vi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (ma hoa)). hieu va cam tuc va ((hanh vi) or (dinh vi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) OR (ma hoa)). hieu va cam tuc va ((hanh vi) or (dinh vi)) cua triet*.