Perhaps you should try some spelling variations:
cuu thuc » cuu tac
thuc dan » thuc hanh, hoc dan, thuc vat
su triet » su viet, su tien, ve triet
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
ve cuu » ve cau, ve chu, ve cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang ha hoi. hieu ve cuu thuc dan ((hanh de) or (hanh vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ha hoi. hieu ve cuu thuc dan ((hanh de) OR (hanh vi)) su triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. hieu ve cuu thuc dan ((hanh de) or (hanh vi)) su triet*.