Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh tai, thanh oai
thanh van » thanh san, thanh toan, thanh phan
cau treo » cau theo, cau tren, cau triet
sang mai » sang ma, sang tai, lang mai
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky sang mai hoi. hieu ((ve cao) OR (ve cac)) duc va ((thanh vai) or (thanh van)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang mai hoi. hieu ((ve cao) OR (ve cac)) duc va ((thanh vai) OR (thanh van)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang mai hoi. hieu ((ve cao) OR (ve cac)) duc va ((thanh vai) or (thanh van)) cau treo".
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang mai hoi. hieu ((ve cao) OR (ve cac)) duc va ((thanh vai) or (thanh van)) cau treo*.