Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
xang cho » sang cho, hang cho, tang cho
cac vuc » cac nuoc, cac vung, cac cuoc
ca cuoc » va cuoc, cho cuoc, dao cuoc
cua chu » sua chua
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
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 (hoc sach)) ty xang cho hoc. hieu ve ((cac vuc) or (ca cuoc)) van hanh vi cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty xang cho hoc. hieu ve ((cac vuc) OR (ca cuoc)) van hanh vi cua chu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ty xang cho hoc. hieu ve ((cac vuc) or (ca cuoc)) van hanh vi cua chu*".