Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ly vang » ly van, ly quang
ly hang » ly quang
ly nang » ky nang, ly quang, may nang
cua tre » cua te, cuu tre, cua triet
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: su sach ((((ly nang) OR (ly hang))) or (ly vang)) xa hoi. hieu ve cac thuc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((ly nang) OR (ly hang))) OR (ly vang)) xa hoi. hieu ve cac thuc va danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((((ly nang) OR (ly hang))) or (ly vang)) xa hoi. hieu ve cac thuc va danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((((ly nang) OR (ly hang))) or (ly vang)) xa hoi. hieu ve cac thuc va danh vi cua tre*.