Perhaps you should try some spelling variations:
van hang » van khang, van hoang, van thang
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
va cuu » va cau, va chu, va huu
ve cao » va cao, ve bao, ve co
san y » san _
dan y » dan ky, dan _, day y

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((san y) OR (dan y)) nang xa hoi. hieu ((ve cao) or (ve cac)) duc van hang va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((san y) OR (dan y)) nang xa hoi. hieu ((ve cao) OR (ve cac)) duc van hang va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((san y) OR (dan y)) nang xa hoi. hieu ((ve cao) or (ve cac)) duc van hang va cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((san y) OR (dan y)) nang xa hoi. hieu ((ve cao) or (ve cac)) duc van hang va cuu tre*.