Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
sach ky » sach y, sach ty, sach kem
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
tai cua » thai cua, tai cuc, tri cua
sac ky » cac ky, sai ky
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 ky) or (sac ky)) nang cao hoc. hieu ve cac duc ban thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang cao hoc. hieu ve cac duc ban thanh tai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang cao hoc. hieu ve cac duc ban thanh tai cua triet*.