Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
va nham » va cham, va tham, va nha
hanh ve » hanh vi, hanh va
sai ky » sac ky
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((((sach kem) or (hanh kem))) or (sai ky)) nang xa hoi. lieu va nham thuc day hanh ve su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach kem) OR (hanh kem))) OR (sai ky)) nang xa hoi. lieu va nham thuc day hanh ve su triet.
• Adding a wildcard symbol may retrieve word variants: su ((((sach kem) or (hanh kem))) or (sai ky)) nang xa hoi. lieu va nham thuc day hanh ve su triet*.