Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
vien dai » hien dai
vien cac » vien bach, vien da, gian cac
nang xa » lang xa, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
su sach » so sach, vu sach

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 y ((nang xa) or (nang x)) hoi. hieu ((vien cac) OR (vien dai)) tu va hanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu ((vien cac) OR (vien dai)) tu va hanh tai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (nang x)) hoi. hieu ((vien cac) OR (vien dai)) tu va hanh tai cua triet*".