Perhaps you should try some spelling variations:
ban lanh » ban hanh, ban linh, ban anh
su triet » su tien, ve triet
lanh hai » manh hai, thanh hai, lang chai
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
ky hang » ky nang, ly hang, ky dang
so viet » hoc viet
ve cac » va cac, vien cac
va hoi » xa hoi, va hoc, va hoa

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 ky hang va hoi. hieu ve cac duc ban lanh hai ((su triet) or (((su viet) or (so viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky hang va hoi. hieu ve cac duc ban lanh hai ((su triet) OR (((su viet) OR (so viet)))).
• Adding a wildcard symbol may retrieve word variants: su sach ky hang va hoi. hieu ve cac duc ban lanh hai ((su triet) or (((su viet) or (so viet))))*.