Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
qua pham » quan pham, quy pham, qua cham
sach ky » sach y, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
dao dat » dao dan, dan dat, mao dat
dat cua » dai cua, day cua, mat cua
sac ky » cac ky, sai ky
va dao » ca dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) OR (sac ky)) nang x hoi. hieu qua pham thuc va dao dat cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sac ky)) nang x hoi. hieu qua pham thuc va dao dat cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sac ky)) nang x hoi. hieu qua pham thuc va dao dat cua triet*.