Perhaps you should try some spelling variations:
thien van » thi van
cau thuc » cau truc, cuu thuc, can thuc
su sach » vu sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet
yu hang » yu zhang, yu pang, yu wang
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di cua
co hoi » co hoc, co loi

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) OR (so sach)) ((_ hang) or (yu hang)) co hoi. thien van cau thuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((_ hang) OR (yu hang)) co hoi. thien van cau thuc va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ((_ hang) or (yu hang)) co hoi. thien van cau thuc va hanh vi cua tre*".