Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thanh lai » thanh hai, thanh lap, thanh loi
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam

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) OR (nang ma)) hoi. hieu ve cam thuc day thanh lai ((cua tre) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu ((nang xa) OR (nang ma)) hoi. hieu ve cam thuc day thanh lai ((cua tre) OR (cau triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu ((nang xa) OR (nang ma)) hoi. hieu ve cam thuc day thanh lai ((cua tre) or (cau triet))*".