Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
thuc va » thuc vat, thuc dan
lua tre » cua tre, luy tre, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
vi lua » vi luu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ma hoi. hieu qua cam ((tuc xa) OR (((thuc va) OR (thuc day)))) hanh vi lua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ma hoi. hieu qua cam ((tuc xa) or (((thuc va) OR (thuc day)))) hanh vi lua tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ma hoi. hieu qua cam ((tuc xa) or (((thuc va) OR (thuc day)))) hanh vi lua tre*.