Perhaps you should try some spelling variations:
thien van » thi van
lam duoc » nam duoc, luat duoc, lam thuoc
ma thanh » mai thanh, va thanh, ha thanh
thanh ca » thanh cha, thanh cac, thanh ha
cao hoi » cau hoi, co hoi, cao hoc
van lam » van nam
duoc ma » duoc lam
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach 2, sach vay
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 v) OR (sach y)) nang cao hoi. thien van lam duoc ma thanh ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach v) OR (sach y)) nang cao hoi. thien van lam duoc ma thanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach v) OR (sach y)) nang cao hoi. thien van lam duoc ma thanh ca cua tre*.