Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
danh vi » hanh vi, dinh vi, danh di
cuu ban » cuu van, cua ban, cuu san
ve cham » va cham, ve chat, vu cham
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
ty lang » tay lang, ty xang, ty hang
ve cac » va cac, vien cac
vi cua » vai cua, di cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty lang ((van hoi) OR (van hoc)). hieu ((ve cham) or (ve cac)) cuu ban danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty lang ((van hoi) OR (van hoc)). hieu ((ve cham) OR (ve cac)) cuu ban danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty lang ((van hoi) OR (van hoc)). hieu ((ve cham) or (ve cac)) cuu ban danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty lang ((van hoi) OR (van hoc)). hieu ((ve cham) or (ve cac)) cuu ban danh vi cua te*.