Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
duc ban » duc tan, duc van, dua ban
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
tu sach » su sach, te sach, tu cach
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) OR (tu sach)) ty 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) OR (tu sach)) ty 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) OR (tu sach)) ty 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) OR (tu sach)) ty lang xa hoi. hieu ve pham duc ban ((danh vi) or (dinh vi)) cua te*.