Perhaps you should try some spelling variations:
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
ban hanh » ban hang
thu sach » tu sach, thuat sach, thuoc sach
cau phoi » cau hoi, cap phoi, cay phoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
y danh » ky danh, ly danh, 2 danh
1 danh » 2 danh
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 ((y danh) OR (1 danh)) cau phoi. hieu ve cam duc ban hanh ((than cua) or (thai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y danh) OR (1 danh)) cau phoi. hieu ve cam duc ban hanh ((than cua) OR (thai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y danh) OR (1 danh)) cau phoi. hieu ve cam duc ban hanh ((than cua) or (thai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y danh) OR (1 danh)) cau phoi. hieu ve cam duc ban hanh ((than cua) or (thai cua)) triet*.