Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
ca tren » cau tren, cu tren, la tren
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan 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 san ky ((nang xa) or (nang x)) hoi. hieu ve cam xuc va hanh ve ((ca tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (nang x)) hoi. hieu ve cam xuc va hanh ve ((ca tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) or (nang x)) hoi. hieu ve cam xuc va hanh ve ((ca tren) or (dau tren))*.