Perhaps you should try some spelling variations:
quang hoang » quan hoang, tuan hoang, xuan hoang
theo chieu » theo tieu, ho chieu, theo chu
cong quang » luong quang, thong quang, duong quang
hoang cong » hang cong, hoang long, hoang vuong
mot chieu » doi chieu, ho chieu
trinh van » trinh han, trinh quan, trinh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (mot chieu)) sach - thanh cong quang hoang cong trinh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (mot chieu)) sach - thanh cong quang hoang cong trinh van ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (mot chieu)) sach - thanh cong quang hoang cong trinh van ban*.