Perhaps you should try some spelling variations:
ban danh » ban doanh, ban hanh, ban dan
lang van » dang van, tang van, hoang van
tu sach » thu sach, te sach, tu cach
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 hoi » van hoa, van hoc, van hoe
ty lang » tay lang, ty xang, ty hang
su sach » so sach, vu sach
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) OR (su sach)) ty lang van hoi. 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) OR (su sach)) ty lang van hoi. 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) OR (su sach)) ty lang van hoi. hieu ((ve cham) or (ve cac)) cuu ban danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty lang van hoi. hieu ((ve cham) or (ve cac)) cuu ban danh vi cua te*.