Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
doi cua » dai cua, hoi cua
hoa han » hoa phan, hoa dan, hoa van
hoa ban » hoa dan, hoa van, hoa tan
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
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: tu sach ty nang xa hoi. ((hieu ve) or (lieu va)) cau ((hoa ban) OR (hoa han)) thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((hieu ve) OR (lieu va)) cau ((hoa ban) OR (hoa han)) thanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. ((hieu ve) or (lieu va)) cau ((hoa ban) OR (hoa han)) thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. ((hieu ve) or (lieu va)) cau ((hoa ban) OR (hoa han)) thanh doi cua tre*.