Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach ky » sach y, sach ty, sach kem
bai cua » ban cua, dai cua, bai ca
dao bai » cao bai, dao hai, dao lai
thuc va » thuc vat, thuc dan, thuc day
va chan » va phan, va chat, va cham
dang xa » dang xay, lang xa, dang ha
va can » va cac, va cao, va con
sac ky » cac ky, sai ky
va dao » ca dao

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 ky) or (sac ky)) dang xa hoi. lieu ((va can) OR (va chan)) thuc va dao bai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) dang xa hoi. lieu ((va can) OR (va chan)) thuc va dao bai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) dang xa hoi. lieu ((va can) OR (va chan)) thuc va dao bai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) dang xa hoi. lieu ((va can) OR (va chan)) thuc va dao bai cua triet*.