Perhaps you should try some spelling variations:
thien van » thi van
qua danh » qua dan, luan danh, luat danh
toc sach » hoc sach, doc sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
tuan de » tuan le, luan de, toan de
qua anh » sua anh, qua thanh, quang anh
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu 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: ((te sach) or (toc sach)) thu nang x hoi. thien van nam ((qua anh) OR (qua danh)) tuan de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thu nang x hoi. thien van nam ((qua anh) OR (qua danh)) tuan de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) thu nang x hoi. thien van nam ((qua anh) OR (qua danh)) tuan de cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) thu nang x hoi. thien van nam ((qua anh) OR (qua danh)) tuan de cua tre*.