Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hieu nganh » vien nganh, hieu manh, nghiep nganh
trung cong » truong cong, trong cong, trung uong
hiem ngan » kim ngan, viem gan
nam trung » nam trong, tai trung, ba trung
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
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) or (canh tranh)) nam trung cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hiem ngan)) - ((hanh trung) OR (canh tranh)) nam trung cong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) OR (hiem ngan)) - ((hanh trung) or (canh tranh)) nam trung cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) OR (hiem ngan)) - ((hanh trung) or (canh tranh)) nam trung cong manh toan ban*.