Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
thuc va » thuc vat, thuc day
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
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 y nang mai hoi. hieu ((ve cham) or (va cac)) ((thuc va) or (thuc dan)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai hoi. hieu ((ve cham) OR (va cac)) ((thuc va) OR (thuc dan)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai hoi. hieu ((ve cham) or (va cac)) ((thuc va) or (thuc dan)) hanh vi cua tre*.