Perhaps you should try some spelling variations:
danh thanh » dinh thanh, nhanh thanh, ban thanh
dang thanh » dong thanh, hoang thanh, quang thanh
dang hanh » ban hanh, dang van, dang hung
khoe sach » khoa sach, hoc sach, khoe sinh
khoa kham » kho khan, khoa than
khoa phu » khoa phau, khoa thu, hoa phu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((danh thanh) or (((dang thanh) OR (dang hanh)))) khoe sach ((khoa kham) or (khoa phu)) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((danh thanh) OR (((dang thanh) OR (dang hanh)))) khoe sach ((khoa kham) OR (khoa phu)) thong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((danh thanh) or (((dang thanh) OR (dang hanh)))) khoe sach ((khoa kham) or (khoa phu)) thong".
• Adding a wildcard symbol may retrieve word variants: toc ((danh thanh) or (((dang thanh) OR (dang hanh)))) khoe sach ((khoa kham) or (khoa phu)) thong*.