Perhaps you should try some spelling variations:
cac thue » cuc thue, cac thu, cach thuc
su sach » vu sach
so sach » so sanh, bo sach, co sach
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
thue va » thuc va, thuyet va, thuc vat
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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)) ly nang x hoi. hieu ve cac thue va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly nang x hoi. hieu ve cac thue va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ly nang x hoi. hieu ve cac thue va hanh vi cua tre*.