Perhaps you should try some spelling variations:
thanh tong » thanh cong, thanh tung, thanh long
quan trong » gian trong
hoc thieu » hoc hien
tong quan » thong quan, tong luan, luong quan
cong vang » cong lang, cong quang, cong ngang
cong van » cong san, song van, cong tan
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) or (toc thieu)) xanh - thanh tong quan trong ((cong van) OR (cong vang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - thanh tong quan trong ((cong van) OR (cong vang)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) xanh - thanh tong quan trong ((cong van) OR (cong vang)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - thanh tong quan trong ((cong van) OR (cong vang)) toan ban*.