Perhaps you should try some spelling variations:
danh kien » dinh kien, danh viet, linh kien
cu tren » tu tren, dua tren
nang xa » lang xa, nang ma, mang xa
kien cu » dien cu, kien co, khien cua
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
tu dan » tuc dan, tu ban, cu dan
xuc va » duc va, tuc va, xac va
dan ky » van ky
ve cam » ve cham, ve cac, va cam

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 ((xuc va) or (luc va)) danh kien cu 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 ((xuc va) OR (luc va)) danh kien cu tren.
• Adding a wildcard symbol may retrieve word variants: tu dan ky ((nang xa) or (nang x)) hoi. hieu ve cam ((xuc va) or (luc va)) danh kien cu tren*.