Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
thuc day » thuc dan, thuc vat
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan
van hac » van hoc, van hai, van chat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
van ha » van hoa, van chat, van hanh
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: vu sach ky lang xa hoi. hieu ((van hac) or (van ha)) ((thuc va) OR (thuc day)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang xa hoi. hieu ((van hac) OR (van ha)) ((thuc va) OR (thuc day)) thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky lang xa hoi. hieu ((van hac) or (van ha)) ((thuc va) OR (thuc day)) thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang xa hoi. hieu ((van hac) or (van ha)) ((thuc va) OR (thuc day)) thanh vi cua tre*.