Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nang cho » nang chon, ngang cho, nang cao
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, sach tham
cho hoc » co hoc, khoa hoc
sach tu » cach tu, sach ty, sach uu
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua cau » cua chu, cua cay, cua can

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach tu) or (sach thu)) nang cho hoc. hieu van cac xuc van thanh vi ((cua cau) OR (cua cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach tu) OR (sach thu)) nang cho hoc. hieu van cac xuc van thanh vi ((cua cau) OR (cua cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach tu) or (sach thu)) nang cho hoc. hieu van cac xuc van thanh vi ((cua cau) OR (cua cac))*".