Perhaps you should try some spelling variations:
thien van » thi van
cau treo » cau theo, cau tren, cau triet
so lang » o lang, so dang, hoa lang
lo lang » o lang, le lang, hoa lang
van tac » van thac, van tai, van tan
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ((lo lang) OR (so lang)) xa hoi. thien van tac tu va danh vi ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((lo lang) OR (so lang)) xa hoi. thien van tac tu va danh vi ((cua tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ((lo lang) OR (so lang)) xa hoi. thien van tac tu va danh vi ((cua tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: so sanh ((lo lang) OR (so lang)) xa hoi. thien van tac tu va danh vi ((cua tre) or (cau treo))*.