Perhaps you should try some spelling variations:
dao kien » dao tien, da kien, dao mien
ca tren » cau tren, cu tren, la tren
nang xa » lang xa, nang ma, mang xa
kien ca » kien ha, kien va, bien ca
ve cac » va cac, vien cac
va dao » ca dao
xuc va » duc va, tuc va, luc va
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (ve cac)) xuc va dao kien ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) OR (ve cac)) xuc va dao kien ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (ve cac)) xuc va dao kien ca tren".
• Adding a wildcard symbol may retrieve word variants: tu dan ky ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (ve cac)) xuc va dao kien ca tren*.