Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thien van » thi van
duc ban » duc tan, duc van, dua ban
dan cua » dan ca, ban cua, dai cua
van cua » vang cua, ban cua, nan cua
su sach » so sach, vu sach
lam duc » lam duoc, pham duc, nam duoc
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
van lam » van nam

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 ((nang x) or (nang ma)) hoi. thien van lam duc ban thanh ((van cua) or (dan cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang x) OR (nang ma)) hoi. thien van lam duc ban thanh ((van cua) OR (dan cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang x) or (nang ma)) hoi. thien van lam duc ban thanh ((van cua) or (dan cua)) triet*.