Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
luat duoc » luat tuc
thanh ca » thanh cha, thanh cac, thanh ha
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
cua tre » cua te, cua triet, dua tren
so sach » so sanh, bo sach, co sach
duoc ma » duoc lam
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ma hoi. hieu van luat duoc ma ((thanh ca) or (thanh phan)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ma hoi. hieu van luat duoc ma ((thanh ca) OR (thanh phan)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ma hoi. hieu van luat duoc ma ((thanh ca) or (thanh phan)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ma hoi. hieu van luat duoc ma ((thanh ca) or (thanh phan)) ((cua tre) OR (cuu tre))*.