Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua triet » cua viet, su triet, va triet
thuc va » thuc vat, thuc dan, thuc day
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
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 dang ma hoi. hieu ve cham thuc va doan vi ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ma hoi. hieu ve cham thuc va doan vi ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ma hoi. hieu ve cham thuc va doan vi ((cua triet) or (cuu tre))*.