Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
cua tre » cua te, cuu tre, dua tren
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
sach ky » sach y, sach ty, sach kem
dang ha » dong ha, dung ha, lang ha
hieu ve » hieu va, hieu van
ha hoi » hoa hoi, ha noi, xa hoi
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sac ky)) dang ha hoi. hieu ve cam thuc va tinh va ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) dang ha hoi. hieu ve cam thuc va tinh va ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) dang ha hoi. hieu ve cam thuc va tinh va ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) dang ha hoi. hieu ve cam thuc va tinh va ((cua tre) or (cua triet))*.