Perhaps you should try some spelling variations:
trien quang » tuyen quang, dien quang, thien quan
thong cong » trong cong, tong cong, thong thong
ve thong » he thong, va thong, ve phong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
toan ve » toan va, toan ke, toan von

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((trien quang) OR (tran quang)) - tinh toan ve thong cong tan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((trien quang) OR (tran quang)) - tinh toan ve thong cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((trien quang) OR (tran quang)) - tinh toan ve thong cong tan toan ban*.