Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, hieu quan
trien quang » tran quang, tuyen quang, dien quang
hanh trinh » canh tranh, hanh chinh
quang dang » quang dung, quang dong, quang hoang
quan lang » quan hoang, gian lang, quan luan
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
toan ban » van 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 (trien quang)) - hanh trinh ((quang dang) or (quan lang)) cong lang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu quang) OR (trien quang)) - hanh trinh ((quang dang) OR (quan lang)) cong lang toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu quang) OR (trien quang)) - hanh trinh ((quang dang) or (quan lang)) cong lang toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu quang) OR (trien quang)) - hanh trinh ((quang dang) or (quan lang)) cong lang toan ban*.