Perhaps you should try some spelling variations:
cham sac » cham soc, pham sach, cap sac
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sac van » cac van, san van, sat van
cua tre » cua te, cuu tre, cua triet

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 xang xa hoi. hieu vu cham sac van hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu vu cham sac van hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu vu cham sac van hanh vi ((cua tre) or (su triet))*.