Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ma hoi » xa hoi, ma hoa, me hoi
xuc va » duc va, tuc va, luc va
vi va » vi van, vai va, vu va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach ty)) nang ((ma hoi) or (mai hoi)). hieu ve cham xuc va hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang ((ma hoi) OR (mai hoi)). hieu ve cham xuc va hanh vi va thiet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang ((ma hoi) or (mai hoi)). hieu ve cham xuc va hanh vi va thiet*.