Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
xang xay » dang xay, van xay, xang dau
chat cua » nhat cua, chat va, chat huu
tu sach » su sach, te sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
danh du » danh dau, danh tu, dinh du
dinh vi » dinh ve, dinh viet, dinh tri
cua tre » cua te, cuu tre, cua triet

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 xang xay hoi. hieu ve chat cua ban ((danh du) or (dinh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ty xang xay hoi. hieu ve chat cua ban ((danh du) OR (dinh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty xang xay hoi. hieu ve chat cua ban ((danh du) or (dinh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty xang xay hoi. hieu ve chat cua ban ((danh du) or (dinh vi)) cua tre*.