Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
nhanh lang » nhanh quang, nhanh thang, nhan dang
cua khong » hua khong, cua phuong, cua thuong
khoan cam » khoa cam, khoan va, phan cam
lang cua » mang cua, hang cua, long cua
cong dan » cong san, cong tan, cong dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (chieu sach)) - nhanh lang cua khong ((cong dan) or (huong dan)) khoan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - nhanh lang cua khong ((cong dan) OR (huong dan)) khoan cam.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - nhanh lang cua khong ((cong dan) or (huong dan)) khoan cam".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - nhanh lang cua khong ((cong dan) or (huong dan)) khoan cam*.