Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
va cam » va cham, va cac, va cao
dai va » mai va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((((nang ma) or (mang may))) or (lang xa)) hoi. hieu va cam duc ban thanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((((nang ma) OR (mang may))) OR (lang xa)) hoi. hieu va cam duc ban thanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((((nang ma) or (mang may))) or (lang xa)) hoi. hieu va cam duc ban thanh dai va triet*.