Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung huong » nhung phuong, nhung tuong, nhung cong
thieu sang » chieu sang, thieu quang, hieu lang
hanh doanh » chinh doanh, doanh doanh, kinh doanh
hang doanh » nhung doanh, van doanh, dung doanh
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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) OR (thieu khang)) - ((hanh doanh) or (hang doanh)) va nhung huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - ((hanh doanh) OR (hang doanh)) va nhung huong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - ((hanh doanh) or (hang doanh)) va nhung huong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - ((hanh doanh) or (hang doanh)) va nhung huong dan toan cau*.