Perhaps you should try some spelling variations:
thieu nien » thien nhien
dia danh » dia ban, gia dinh
nien hoc » dien hoc, nhiet hoc, khien hoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cuu tre » cau tren, cau treo

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 ky dang xa hoi. thieu nien hoc nuoc ((dia danh) or (va hanh)) dai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xa hoi. thieu nien hoc nuoc ((dia danh) OR (va hanh)) dai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. thieu nien hoc nuoc ((dia danh) or (va hanh)) dai ((cua tre) OR (cuu tre))*".