Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
thuc day » thuc dan, thuc vat
hanh hai » thanh hai, nhanh hai, hang hai
thuc va » thuc vat, thuc dan
cong ha » cong hoa, dong ha, cong tac
hiem he » hiem xe, hieu he, thien he
ky cong » ke cong, ly cong, khu cong
sac ky » cac ky, sai ky
he nam » ha nam, nghe nam
ha hoi » hoa hoi, ha noi, xa hoi
te sac » te sach, te cac, te san

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 cong ha hoi. hiem he nam ((thuc va) or (thuc day)) hanh hai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky cong ha hoi. hiem he nam ((thuc va) OR (thuc day)) hanh hai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky cong ha hoi. hiem he nam ((thuc va) or (thuc day)) hanh hai ((cua triet) or (cua viet))*.