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

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) or (thu sach)) y ((nang x) or (lang xa)) hoi. hieu ve cac luc va hanh than va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y ((nang x) OR (lang xa)) hoi. hieu ve cac luc va hanh than va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y ((nang x) or (lang xa)) hoi. hieu ve cac luc va hanh than va triet*.