Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, dua tren

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