Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang doi » hang loi, huong doi, hang tai
lam thuc » lam thuoc, am thuc, nam thuc
thuc dan » thuc hanh, hoc dan, thuc vat
hang di » hang vi, hang dien, hang dich
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ve lam » va lam, de lam, se lam
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang xa hoi. hieu ve lam thuc dan ((hang di) or (hang doi)) ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ve lam thuc dan ((hang di) OR (hang doi)) ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ve lam thuc dan ((hang di) or (hang doi)) ((cua triet) or (cuu tre))*.