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

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 ((danh kien) OR (dinh 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 ((danh kien) OR (dinh kien)) cu 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 xuc va ((danh kien) OR (dinh 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 ((danh kien) OR (dinh kien)) cu tren*.