Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach, vu sach
hanh ve » hanh vi, hanh va, hanh kem
thuc va » thuc vat, thuc day
sach ky » sac ky, sach y, sach ty
va nham » va cham, va tham, va nha
mang xa » lang xa, mang may, dang xay
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((mang xa) or (lang ha)) hoi. lieu va nham ((thuc va) or (thuc dan)) hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((mang xa) OR (lang ha)) hoi. lieu va nham ((thuc va) OR (thuc dan)) hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((mang xa) or (lang ha)) hoi. lieu va nham ((thuc va) or (thuc dan)) hanh ve cua tre*.