Perhaps you should try some spelling variations:
nghiep nganh » nghiep thanh, nghiep ninh, nghiep anh
vien nganh » vien thanh
nhung cong » dung cong, thong cong, hang cong
hanh hang » thanh hang, hang hang, hanh han
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nghiep nganh) or (vien nganh)) - hanh hang va nhung cong ((dan than) OR (van than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nghiep nganh) OR (vien nganh)) - hanh hang va nhung cong ((dan than) OR (van than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nghiep nganh) or (vien nganh)) - hanh hang va nhung cong ((dan than) OR (van than)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((nghiep nganh) or (vien nganh)) - hanh hang va nhung cong ((dan than) OR (van than)) cao*.