Perhaps you should try some spelling variations:
danh kien » dinh kien, danh viet, linh kien
cu tren » tu tren, dua tren
va danh » va dinh, va dan, va hanh
nang xa » lang xa, nang ma, mang xa
ca tren » cau tren, la tren, co tren
hieu ve » hieu va, hieu van
tu ban » thu ban, te ban
xuc va » duc va, tuc va, luc va
ban ky » van ky, dan 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 ban ky ((nang xa) or (nang x)) hoi. hieu ve cam xuc va danh kien ((ca tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky ((nang xa) OR (nang x)) hoi. hieu ve cam xuc va danh kien ((ca tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky ((nang xa) or (nang x)) hoi. hieu ve cam xuc va danh kien ((ca tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((nang xa) or (nang x)) hoi. hieu ve cam xuc va danh kien ((ca tren) OR (cu tren))*.