Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
nang cho » nang chon, ngang cho, nang cao
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
tru nang » tra nang, tri nang, truc nano
hoc sach » hoc sinh, hoc cac, hoc anh
cho hoc » co hoc, khoa hoc
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
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: ((toc sach) OR (hoc sach)) tru nang cho hoc. hieu van cau xuc van hanh vi ((cua cau) or (cua cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) tru nang cho hoc. hieu van cau xuc van hanh vi ((cua cau) OR (cua cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) tru nang cho hoc. hieu van cau xuc van hanh vi ((cua cau) or (cua cac))*".