Perhaps you should try some spelling variations:
thiet danh » thien danh, thien dang, tiep danh
thien anh » thien danh, tien anh, thien thanh
cua trong » cua truong, cua trung, qua trong
van thuan » van tuan, van than, van quan
anh dang » anh dong, anh dung, anh bang
dang cua » dung cua, dong cua, mang cua
van huan » van quan, van tuan, van han

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 anh)) - anh dang cua trong cong ((van huan) OR (van thuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet danh) OR (thien anh)) - anh dang cua trong cong ((van huan) OR (van thuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet danh) or (thien anh)) - anh dang cua trong cong ((van huan) OR (van thuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet danh) or (thien anh)) - anh dang cua trong cong ((van huan) OR (van thuan)) cao*.