Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
danh kien » dinh kien, linh kien, van kien
ca tren » cau tren, cu tren, la tren
nang xa » lang xa, nang ma, mang xa
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
tu van » tu 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 van ky ((nang xa) or (nang x)) hoi. hieu ve cam tuc va ((danh kien) or (danh viet)) ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky ((nang xa) OR (nang x)) hoi. hieu ve cam tuc va ((danh kien) OR (danh viet)) ca tren.
• Adding a wildcard symbol may retrieve word variants: tu van ky ((nang xa) or (nang x)) hoi. hieu ve cam tuc va ((danh kien) or (danh viet)) ca tren*.