Perhaps you should try some spelling variations:
thien van » thi van
nang cau » nang cao, hang cau, nang dau
thanh ca » thanh cha, thanh cac, thanh ha
lam duoc » luat duoc, lam thuoc, tao duoc
ma thanh » mai thanh, va thanh, ha thanh
nam duoc » nam thuoc, dat duoc, nam moc
so sach » so sanh, bo sach, co sach
da duoc » tao duoc, hoa duoc
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ca cua » co cua

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 cau hoi. thien van ((((lam duoc) OR (nam duoc))) or (da duoc)) ma thanh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang cau hoi. thien van ((((lam duoc) OR (nam duoc))) OR (da duoc)) ma thanh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang cau hoi. thien van ((((lam duoc) OR (nam duoc))) or (da duoc)) ma thanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y nang cau hoi. thien van ((((lam duoc) OR (nam duoc))) or (da duoc)) ma thanh ca cua tre*.