Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chinh doanh » kinh doanh
thieu sang » chieu sang, thieu quang, hieu lang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

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