Perhaps you should try some spelling variations:
ban hanh » ban hang
toc sach » hoc sach, doc sach, thuoc sach
ty ngang » te ngan, tu ngan, ty xang
cho hoc » co hoc, khoa hoc
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
ly ngan » ly nhan
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: ((te sach) OR (toc sach)) ((ty ngang) or (ly ngan)) cho hoc. hieu ve cac xuc ban hanh vi cua cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((ty ngang) OR (ly ngan)) cho hoc. hieu ve cac xuc ban hanh vi cua cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((ty ngang) or (ly ngan)) cho hoc. hieu ve cac xuc ban hanh vi cua cac*".