Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
xang cho » sang cho, tang cho, bang cho
hang cho » sang cho, hang khoa, phong cho
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
hieu ve » hieu va, hieu van
sach ty » sach tu, sach thu, xach tay
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien 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 ty) or (sach y)) ((xang cho) OR (hang cho)) hoc. hieu ve cac vuc van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach y)) ((xang cho) OR (hang cho)) hoc. hieu ve cac vuc van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach y)) ((xang cho) OR (hang cho)) hoc. hieu ve cac vuc van hanh vi cua cau*".