Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
cu tren » tu tren, dua tren
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
tu bai » tu ban, tu bat, te bai
xuc va » duc va, tuc va, luc va
bai ky » ban ky, sai ky, bac ky
ve cam » ve cham, ve cac, va cam

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky ((lang xa) OR (nang x)) hoi. hieu ve cam xuc va hanh ve ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky ((lang xa) or (nang x)) hoi. hieu ve cam xuc va hanh ve ((cau tren) OR (cu tren))~".
• Adding a wildcard symbol may retrieve word variants: tu bai ky ((lang xa) or (nang x)) hoi. hieu ve cam xuc va hanh ve ((cau tren) OR (cu tren))*.