Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
vang cua » mang cua, hang cua, tang cua
cham tuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet

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 xa) OR (nang ma)) hoi. hieu ve cham tuc ((va danh) or (vay doanh)) vang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cham tuc ((va danh) OR (vay doanh)) vang cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cham tuc ((va danh) or (vay doanh)) vang cua tre*".