Perhaps you should try some spelling variations:
thieu nien » thien nhien
va thanh » gia thanh, ban thanh, va tinh
nien cam » nien giam, trien cam, vien cac
ve triet » va trien, su triet
dang xay » dang van, van xay
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
ve ve » de ve, va ve, ke ve

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 dang xay hoi. thieu nien cam xuc ((va hanh) or (va thanh)) ve ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky dang xay hoi. thieu nien cam xuc ((va hanh) OR (va thanh)) ve ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky dang xay hoi. thieu nien cam xuc ((va hanh) or (va thanh)) ve ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky dang xay hoi. thieu nien cam xuc ((va hanh) or (va thanh)) ve ve triet*.