Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
xuc ban » duc ban, cuc ban, quoc ban
va chat » van chat, va phat, cao chat
va cham » va tham
sach tu » sach thu, cach tu, 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: thu sach tu ((nang xa) or (nang ma)) hoi. hieu ((va cham) OR (va chat)) xuc ban hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tu ((nang xa) OR (nang ma)) hoi. hieu ((va cham) OR (va chat)) xuc ban hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tu ((nang xa) or (nang ma)) hoi. hieu ((va cham) OR (va chat)) xuc ban hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach tu ((nang xa) or (nang ma)) hoi. hieu ((va cham) OR (va chat)) xuc ban hanh dai cua te*.