Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
dinh vi » dinh ve, dinh viet, dinh tri
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
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 ty nang ((ma hoa) or (mai hoi)). hieu ve cam tuc va ((hanh vi) or (dinh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoa) OR (mai hoi)). hieu ve cam tuc va ((hanh vi) OR (dinh vi)) va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoa) or (mai hoi)). hieu ve cam tuc va ((hanh vi) or (dinh vi)) va triet*.