Perhaps you should try some spelling variations:
thien van » thi van
tham doc » than doc, tham do, tham nuoc
tinh voi » trinh voi, tinh doi, binh voi
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
doc may » hoc may, do may
voi cuu » voi cuoc
cuu tre » cua tre, cau tren, cau treo

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 ky) or (sach ty)) van xay hoi. ((thien van) or (hieu qua)) tham doc may tinh voi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) van xay hoi. ((thien van) OR (hieu qua)) tham doc may tinh voi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) van xay hoi. ((thien van) or (hieu qua)) tham doc may tinh voi cuu tre*.