Perhaps you should try some spelling variations:
tung chuyen » thong chuyen, duong chuyen, nhung chuyen
thanh tung » thanh cong
duong cong » dung cong, duong trong, trong cong
luong cong » dung cong, trong cong, cong cong
chua xang » chua nang, chu bang, chua dong
toan cau » toan cao, toan ban, toan tap
chuc » thuc, chu, phuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chua xang) or (chuc nang)) - thanh tung chuyen ((duong cong) OR (luong cong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chua xang) OR (chuc nang)) - thanh tung chuyen ((duong cong) OR (luong cong)) tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chua xang) or (chuc nang)) - thanh tung chuyen ((duong cong) OR (luong cong)) tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chua xang) or (chuc nang)) - thanh tung chuyen ((duong cong) OR (luong cong)) tinh toan cau*.