Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
thieu sang » chieu sang, thieu khang, thieu quang
trinh quan » tinh quang, trinh luat, trinh han
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh luan
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - hanh ((trinh cua) OR (trinh quan)) nhung huong ((dan than) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trinh cua) OR (trinh quan)) nhung huong ((dan than) OR (ban than)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh ((trinh cua) OR (trinh quan)) nhung huong ((dan than) or (ban than)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trinh cua) OR (trinh quan)) nhung huong ((dan than) or (ban than)) ban*.