Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat
nhung cong » dung cong, thong cong, hang cong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
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: ho ((nhieu tang) or (chieu sach)) - hanh ((trinh quan) OR (trinh han)) nhung cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (chieu sach)) - hanh ((trinh quan) OR (trinh han)) nhung cong vang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (chieu sach)) - hanh ((trinh quan) OR (trinh han)) nhung cong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (chieu sach)) - hanh ((trinh quan) OR (trinh han)) nhung cong vang toan cau*.