Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trang » thanh trung, canh tranh, hanh trinh
trinh toan » tinh toan, thanh toan, trinh han
hieu lang » chieu sang, nhieu tang, hieu van
trang cua » tranh cua, tang cua, trung cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
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 lang) OR (hieu quang))) or (chieu tinh)) - hanh trang cua dung cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((hieu lang) OR (hieu quang))) OR (chieu tinh)) - hanh trang cua dung cong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((hieu lang) OR (hieu quang))) or (chieu tinh)) - hanh trang cua dung cong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((((hieu lang) OR (hieu quang))) or (chieu tinh)) - hanh trang cua dung cong trinh toan cau*.