Perhaps you should try some spelling variations:
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
va dao » ca dao
vi cua » vai cua, di cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((tang ma) OR (nang cao)) hoi. hieu ((ve cam) OR (va dao)) thuc day hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((tang ma) OR (nang cao)) hoi. hieu ((ve cam) OR (va dao)) thuc day hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((tang ma) OR (nang cao)) hoi. hieu ((ve cam) OR (va dao)) thuc day hanh vi cua tre*.