Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
kho tang » cao tang
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
su sach » vu sach
ky tang » ky nang, ky dang, ky trong
so sach » so sanh, bo sach, co sach
vi cua » vai cua, di cua
ve am » va am

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)) ((ky tang) OR (kho tang)) xa hoi. hieu ve am thuc va thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((ky tang) OR (kho tang)) xa hoi. hieu ve am thuc va thanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ((ky tang) OR (kho tang)) xa hoi. hieu ve am thuc va thanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ((ky tang) OR (kho tang)) xa hoi. hieu ve am thuc va thanh vi cua viet*.