Perhaps you should try some spelling variations:
thiet danh » thien anh, thien dang, tiep danh
thien danh » thien anh, thien dang, thien thanh
anh quang » anh xquang, anh quan, nhanh quang
quang cua » quan cua, quang tuan, quang huy
cua trong » cua truong, cua trung, qua trong
van huan » van thuan, van tuan, van han
van quan » 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 ((thiet danh) or (thien danh)) - anh quang cua trong cong ((van huan) or (van quan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet danh) OR (thien danh)) - anh quang cua trong cong ((van huan) OR (van quan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet danh) or (thien danh)) - anh quang cua trong cong ((van huan) or (van quan)) cao*.