Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cac luc » cau luc, coc luc, cac nuoc
luc va » duc va, tuc va, loc va
ve cac » va cac, vien cac

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 y ((nang x) or (lang xa)) hoi. hieu ve cac luc va hanh than ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang x) OR (lang xa)) hoi. hieu ve cac luc va hanh than ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang x) or (lang xa)) hoi. hieu ve cac luc va hanh than ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang x) or (lang xa)) hoi. hieu ve cac luc va hanh than ((cua triet) OR (va triet))*.