Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hieu nganh » vien nganh, hieu manh, nghiep nganh
thong cong » trong cong, tong cong, thong thong
hiem ngan » kim ngan, viem gan
trung dai » truong dai, truong dao, trung tam
dai thong » dai tuong, dai hong, dai thang
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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)) - hanh trung dai thong cong san ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hiem ngan)) - hanh trung dai thong cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (hiem ngan)) - hanh trung dai thong cong san ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hiem ngan)) - hanh trung dai thong cong san ((toan cau) OR (toan ban))*.