Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vien dai » hien dai
danh vai » danh sai, danh va, doanh van
vien cac » vien bach, vien da, gian cac
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
lao va » tao va, cao va, bao va

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) or (vu bach)) ky nang xa hoi. hieu ((vien cac) OR (vien dai)) lao va danh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky nang xa hoi. hieu ((vien cac) OR (vien dai)) lao va danh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu bach)) ky nang xa hoi. hieu ((vien cac) OR (vien dai)) lao va danh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky nang xa hoi. hieu ((vien cac) OR (vien dai)) lao va danh vai cua triet*.