Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
duong manh » duong van
chua xang » chua nang, chuc nang, chu bang
manh toan » thanh toan, anh tuan, tinh toan
anh dung » anh huong, sach dung, ung dung
anh dong » anh huong, anh son
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 ((thuc hanh) or (chua xang)) - ((anh dung) OR (anh dong)) va nhung duong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thuc hanh) OR (chua xang)) - ((anh dung) OR (anh dong)) va nhung duong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thuc hanh) or (chua xang)) - ((anh dung) OR (anh dong)) va nhung duong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((thuc hanh) or (chua xang)) - ((anh dung) OR (anh dong)) va nhung duong manh toan cau*.