Perhaps you should try some spelling variations:
nganh cau » nganh dau, nhanh cau, nganh mac
hieu vien » hieu hien, hieu viec, thieu nien
cua triet » cua viet, su triet, va triet
sach tao » sach dao, sach tai, sach tham
sach bao » sach dao, sach bai, sach bac
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
cac duc » cac du, cac dac, cao duc
duc van » duc va, duc tan, duc manh
hanh va » hang va, hanh vi
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 vien cac duc van hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tao) OR (sach bao)) nganh cau hoi. hieu vien 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 vien cac duc van hanh va cua triet*.