Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
cua dieu » va dieu
dinh dai » dinh dat, sinh dai, dinh dao
tu sach » thu sach, su sach, tu cach
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
ca viet » va viet, co viet, hoa viet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang ma hoi. hieu tu cham thuc va dinh dai ((cua dieu) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoi. hieu tu cham thuc va dinh dai ((cua dieu) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ma hoi. hieu tu cham thuc va dinh dai ((cua dieu) or (ca viet))*.