Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
tuc ban » thuc ban, truc ban, tu ban
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) OR (nang ma)) hoi. hieu ((vu cham) or (cao chat)) tuc ban hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang ma)) hoi. hieu ((vu cham) OR (cao chat)) tuc ban hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) OR (nang ma)) hoi. hieu ((vu cham) or (cao chat)) tuc ban hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) OR (nang ma)) hoi. hieu ((vu cham) or (cao chat)) tuc ban hanh dai cua te*.