Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » vien nganh, hieu manh, nghiep nganh
thong cong » trong cong, tong cong, thong thong
hiem ngan » kim ngan, viem gan
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
cong dan » cong san, cong tan, huong dan
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 ((hieu nganh) OR (hiem ngan)) - thanh trung cap thong cong dan ((than cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cap thong cong dan ((than cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cap thong cong dan ((than cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) OR (hiem ngan)) - thanh trung cap thong cong dan ((than cau) or (phan tu))*.