Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lai » thanh hai, thanh lap, thanh loi
cam thuc » am thuc, nam thuc, cam thu
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, dua tren
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve cam » ve cham, ve cac, va cam

You may be able to get more results by adjusting your search query.

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