Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
tuong manh » duong manh, luong manh, tung manh
hieu lang » hieu quang, nhieu tang, hieu van
manh toan » thanh toan, anh tuan, tinh toan
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: doi ((chieu sang) OR (hieu lang)) - ((hanh tranh) or (hanh chinh)) va nhung tuong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - ((hanh tranh) OR (hanh chinh)) va nhung tuong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (hieu lang)) - ((hanh tranh) or (hanh chinh)) va nhung tuong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (hieu lang)) - ((hanh tranh) or (hanh chinh)) va nhung tuong manh toan cao*.