Perhaps you should try some spelling variations:
ban hanh » ban hang
vuc ban » vu ban, duc ban, cuc ban
cac vuc » cac nuoc, cac vung, cac cuoc
hieu ve » hieu va, hieu van
cua cau » cua cac, cua chu, cua cay
sach tu » sach thu, cach tu, sach uu
cho hoc » khoa hoc
sach ty » sach y, sach thu, xach tay
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 tu) OR (sach ty)) ngang ((cho hoc) or (co hoc)). hieu ve cac vuc ban hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach ty)) ngang ((cho hoc) OR (co hoc)). hieu ve cac vuc ban hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach ty)) ngang ((cho hoc) or (co hoc)). hieu ve cac vuc ban hanh vi cua cau*".