Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, diep quang
hanh trang » thanh trung, canh tranh, hanh trinh
lang cong » dang cong, bang cong, hang cong
thanh lap » thanh san, phan lap, thanh hai
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu quang) OR (hieu qua)) - hanh trang va lang cong dan ((toan cau) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu quang) OR (hieu qua)) - hanh trang va lang cong dan ((toan cau) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu quang) OR (hieu qua)) - hanh trang va lang cong dan ((toan cau) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu quang) OR (hieu qua)) - hanh trang va lang cong dan ((toan cau) or (thanh lap))*.