Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
va triet » va trien, ve triet, cua triet
cong cua » cong cu, dong cua, huong cua
tu sach » thu sach, su sach, te sach
song xa » song cua
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cam vuc » cam xuc
vuc van » duc van, luc van, thuc van
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 (cong cua)) hoi. hieu ve cam vuc van thanh dai ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((song xa) OR (cong cua)) hoi. hieu ve cam vuc van thanh dai ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((song xa) or (cong cua)) hoi. hieu ve cam vuc van thanh dai ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((song xa) or (cong cua)) hoi. hieu ve cam vuc van thanh dai ((va triet) OR (va thiet))*.