Perhaps you should try some spelling variations:
tham tuc » tham thuc, thai tuc, nham thuc
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
va vanh » va van, va danh, va anh
sach ky » sac ky, sach y, sach ty
va tham » van tham, va cham, va thanh
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang ma)) hoi. lieu va tham tuc ((va vanh) OR (va hanh)) dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (nang ma)) hoi. lieu va tham tuc ((va vanh) OR (va hanh)) dai cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (nang ma)) hoi. lieu va tham tuc ((va vanh) OR (va hanh)) dai cua te*.