Perhaps you should try some spelling variations:
hang khoa » dung khoa
toc sach » hoc sach, thuoc sach, nuoc sach
xang cho » sang cho, hang cho, tang cho
van hanh » van thanh, ban hanh, van anh
doc sach » hoc sach, nuoc sach, dac sac
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
cua cau » cua cac, cua chu, cua cay
ve cau » ke cau, va cau, ve cac
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) OR (doc sach)) tu ((xang cho) or (hang khoa)) hoc. hieu ve cau luc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) tu ((xang cho) OR (hang khoa)) hoc. hieu ve cau luc van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) tu ((xang cho) or (hang khoa)) hoc. hieu ve cau luc van hanh vi cua cau*".