Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
dang xay » dang van, van xay
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
hieu le » hieu ve, hieu he, hieu ly
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san
le am » le ham, le nam, le a

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 ((nang xa) or (dang xay)) hoi. hieu le am thuc va hanh hai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (dang xay)) hoi. hieu le am thuc va hanh hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (dang xay)) hoi. hieu le am thuc va hanh hai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (dang xay)) hoi. hieu le am thuc va hanh hai ((cua tre) OR (cua triet))*.