Perhaps you should try some spelling variations:
thuc dan » hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, tu cham
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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 ly nang ma hoi. hieu ((vu cham) or (ca dao)) ((thuc dan) or (thuc hanh)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang ma hoi. hieu ((vu cham) OR (ca dao)) ((thuc dan) OR (thuc hanh)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang ma hoi. hieu ((vu cham) or (ca dao)) ((thuc dan) or (thuc hanh)) hanh vi cua tre*.