Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thu sach » tu sach, thuat sach, thuoc sach
thuc van » thuc vat, thuc dan, thuc va
va triet » va thiet, va trien, ve triet
cong cua » cong cu, dong cua, huong cua
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
vuc van » duc van, luc van, chuc van
song xa » song cua
dai va » mai va
ve cam » ve cham, ve cac, va cam

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

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