Perhaps you should try some spelling variations:
thieu quang » hieu quang, trien quang, hieu quan
thien quan » trien quang, lien quan, thien van
lanh benh » kinh benh, benh benh, manh binh
chua nang » chuc nang, chua xang, cuu nang
kha nang » phap nang, ky nang, ki nang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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 quang) or (thien quan)) - lanh benh ((chua nang) OR (kha nang)) cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu quang) OR (thien quan)) - lanh benh ((chua nang) OR (kha nang)) cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu quang) or (thien quan)) - lanh benh ((chua nang) OR (kha nang)) cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu quang) or (thien quan)) - lanh benh ((chua nang) OR (kha nang)) cong san toan tap*.