Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
thap thong » phap thong, thap trong, chap thuong
khap thong » phap thong, khau thong, khac thuong
hiem ngan » kim ngan, viem gan
hoc hiem » hoc hien, hoc thieu, hoc thiet
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hiem ngan - thanh trong ((thap thong) OR (khap thong)) ((cong tan) or (huong dan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hiem ngan - thanh trong ((thap thong) OR (khap thong)) ((cong tan) OR (huong dan)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hiem ngan - thanh trong ((thap thong) OR (khap thong)) ((cong tan) or (huong dan)) than cau".
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - thanh trong ((thap thong) OR (khap thong)) ((cong tan) or (huong dan)) than cau*.