Perhaps you should try some spelling variations:
thien van » thi van
dang thai » dang thi, dang hai, dang khai
dan thai » dan thi, dan than, ban thai
tu sach » thu sach, su sach, tu cach
te sach » toc sach
van hoc » van hoa
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang x hoi. thien van hoc nuoc va ((dan thai) OR (dang thai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. thien van hoc nuoc va ((dan thai) OR (dang thai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang x hoi. thien van hoc nuoc va ((dan thai) OR (dang thai)) cua tre*".