Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cai » va cac, va bai, va dai
ve cac » va cac, vien cac
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 cac ky nang ma hoi. hieu ((va cai) or (ve cac)) ((thuc va) or (truc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ma hoi. hieu ((va cai) OR (ve cac)) ((thuc va) OR (truc va)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ma hoi. hieu ((va cai) or (ve cac)) ((thuc va) or (truc va)) hanh vi cua tre*.