Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhanh bang » nhanh lang, nhanh mang, nhanh quang
hieu lang » chieu sang, nhieu tang, hieu van
van dung » van dong, xay dung, tin dung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) OR (hieu quang)) - nhanh bang ((va ung) or (van dung)) cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - nhanh bang ((va ung) OR (van dung)) cong van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - nhanh bang ((va ung) or (van dung)) cong van toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - nhanh bang ((va ung) or (van dung)) cong van toan cao*.