Perhaps you should try some spelling variations:
nganh cau » nganh dau, nhanh cau, nganh mac
cua triet » cua viet, su triet, va triet
sach tao » sach dao, sach tai, sach tham
sach bao » sach dao, sach bai, sach bac
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
ve cac » va cac, vien cac
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach tao) OR (sach bao)) nganh cau hoi. hieu ve cac duc van hanh va cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tao) OR (sach bao)) nganh cau hoi. hieu ve cac duc van hanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach tao) OR (sach bao)) nganh cau hoi. hieu ve cac duc van hanh va cua triet*.