Perhaps you should try some spelling variations:
va triet » va trien, ve triet, cua triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
song cua » cong cua, dong cua, huong cua
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
ve cam » ve cham, ve cac, va cam
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((song xa) or (song cua)) hoi. hieu ve cam xuc van hanh lai ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((song xa) OR (song cua)) hoi. hieu ve cam xuc van hanh lai ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((song xa) or (song cua)) hoi. hieu ve cam xuc van hanh lai ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((song xa) or (song cua)) hoi. hieu ve cam xuc van hanh lai ((va triet) OR (va thiet))*.