Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
xang khoa » hang khoa, dang khoa, vang khoa
toc sach » hoc sach, doc sach, nuoc sach
khoa hoc » hoa hoc
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
cua chu » sua chua
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) OR (thuoc sach)) ty xang khoa hoc. hieu ve cac vuc van hanh vi cua chu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ty xang khoa hoc. hieu ve cac vuc van hanh vi cua chu*".