Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hieu nganh » vien nganh, hieu manh, nghiep nganh
hiem ngan » kim ngan, viem gan
tuong dan » huong dan, tung dan, xuong dan
doanh va » doan va, doanh tai, doanh cua
phan cac » phan dau, phan lap, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu nganh) OR (hiem ngan)) - toan doanh va nhung tuong dan ((phan cac) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hiem ngan)) - toan doanh va nhung tuong dan ((phan cac) OR (nhan cach)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) OR (hiem ngan)) - toan doanh va nhung tuong dan ((phan cac) or (nhan cach))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) OR (hiem ngan)) - toan doanh va nhung tuong dan ((phan cac) or (nhan cach))*.