Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
vien cac » vien bach, vien dai, vien da
nang mai » nang ma, nang tai, lang mai
va hanh » van hanh, va danh, ban hanh
mai hoi » mai khoi, dai hoi, lai hoi
lai cua » dai cua, hai cua, lai chau
su sach » so sach, vu sach
ve cac » va cac
y nang » ky nang, ly nang, v nang

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 mai hoi. hieu ((ve cac) or (vien cac)) tac ((va hanh) or (va thanh)) lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang mai hoi. hieu ((ve cac) OR (vien cac)) tac ((va hanh) OR (va thanh)) lai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang mai hoi. hieu ((ve cac) or (vien cac)) tac ((va hanh) or (va thanh)) lai cua triet*.