Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
nang cho » nang chon, ngang cho, nang cao
van hanh » van thanh, ban hanh, van anh
cho hoc » co hoc, khoa hoc
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
cua cau » cua cac, cua chu, cua cay
va cau » van cau, va cac, va dau
vi cua » vai cua, di cua

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 thu) or (sach y)) nang cho hoc. lieu va cau luc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach thu) OR (sach y)) nang cho hoc. lieu va cau luc van hanh vi cua cau*.