Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
ve pham » vi pham, v pham, ve phan
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
ty lang » ty xang, ty hang, tu lang
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: thu sach ((ty lang) OR (tay lang)) xa hoi. hieu ve pham duc ban ((danh vi) or (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty lang) OR (tay lang)) xa hoi. hieu ve pham duc ban ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty lang) OR (tay lang)) xa hoi. hieu ve pham duc ban ((danh vi) or (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty lang) OR (tay lang)) xa hoi. hieu ve pham duc ban ((danh vi) or (dinh vi)) cua te*.