Perhaps you should try some spelling variations:
ngang cho » nang cho, ngang tho, sang cho
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
tu ngang » tu ngan, hu angang, vu ngan
hieu van » hieu va, thien van, lieu va
cac luoc » cac nuoc, cac cuoc, cac quoc
luoc van » luoc can, luoc va, luc van
cho hoc » co hoc, khoa hoc
hieu ve » hieu va
cua cau » cua chu, cua cay, cua can
sach tu » sach thu, cach tu, sach ty

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 tu ngang cho hoc. ((hieu ve) or (hieu van)) cac luoc van hanh vi ((cua cau) OR (cua cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ngang cho hoc. ((hieu ve) OR (hieu van)) cac luoc van hanh vi ((cua cau) OR (cua cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu ngang cho hoc. ((hieu ve) or (hieu van)) cac luoc van hanh vi ((cua cau) OR (cua cac))*".