Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
su sach » so sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
va cau » van cau, va cac, va dau

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 sach)) y nang xa hoi. hieu va cau truc ((va hanh) OR (va thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang xa hoi. hieu va cau truc ((va hanh) OR (va thanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y nang xa hoi. hieu va cau truc ((va hanh) OR (va thanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang xa hoi. hieu va cau truc ((va hanh) OR (va thanh)) vi cua triet*.