Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, truong thanh
chau tinh » cuu tinh, ha tinh, cua tinh
khoan cam » khoa cam, khoan va, phan cam
tung cua » trung cua, tuong cua, dung cua
cong tan » cong tac, cong san, cong ty

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

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