Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
anh vi » anh va, anh ve, anh vu
cua tu » cua tuc, cua su, cua cu

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 y ((nang xa) or (nang ma)) hoi. hieu van cam xuc ban ((anh vi) OR (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (nang ma)) hoi. hieu van cam xuc ban ((anh vi) OR (hanh vi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang xa) or (nang ma)) hoi. hieu van cam xuc ban ((anh vi) OR (hanh vi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (nang ma)) hoi. hieu van cam xuc ban ((anh vi) OR (hanh vi)) cua tu*.