Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
ban hanh » ban hang
nano cho » nang cho, nano cuo, nang chon
cua cau » cua chu, cua cay, cua can
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
cho hoc » co hoc, khoa hoc
ty nano » tu nano, day nano, tao nano

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

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