Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
cac thuc » cach thuc, cac thu, can thuc
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach kem
thuc va » thuc vat, thuc dan, thuc day
dan tai » van tai, dan thi, han tai
va dan » ca dan, va dao, va dau

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