Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » thong cong, hang cong, nhung don
theo hieu » theo chieu, theo tieu, thien hieu
thang cua » thong cua, hang cua, than cua
dung cong » dung trong
than cau » phan cau, than cap, thanh chau
toan cau » 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: theo hieu quang - nhanh thang cua ((nhung cong) or (dung cong)) ban ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu quang - nhanh thang cua ((nhung cong) OR (dung cong)) ban ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu quang - nhanh thang cua ((nhung cong) or (dung cong)) ban ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo hieu quang - nhanh thang cua ((nhung cong) or (dung cong)) ban ((than cau) OR (toan cau))*.