Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thanh hai » thanh phan, thanh hoa, thanh san
thuc day » thuc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
thuc va » thuc vat, thuc dan
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano

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 tu nang xa hoi. hieu ve pham ((thuc va) OR (thuc day)) thanh hai ((cua tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. hieu ve pham ((thuc va) OR (thuc day)) thanh hai ((cua tre) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang xa hoi. hieu ve pham ((thuc va) OR (thuc day)) thanh hai ((cua tre) or (cau triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. hieu ve pham ((thuc va) OR (thuc day)) thanh hai ((cua tre) or (cau triet))*.