Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
qua hai » qua hoat
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
hai cuu » hai cua, hai chu, hai cuc
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang xa hoi. hieu qua hai cuu ((va danh) OR (va dinh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. hieu qua hai cuu ((va danh) OR (va dinh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. hieu qua hai cuu ((va danh) OR (va dinh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. hieu qua hai cuu ((va danh) OR (va dinh)) vi cua triet*.