Perhaps you should try some spelling variations:
thieu nien » thien nhien
thu sach » thuat sach, thuoc sach, thu hoach
nien cac » vien cac, dien cac, bien cac
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 (thu sach)) ky lang xa hoi. thieu nien cac luc va hanh vi ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky lang xa hoi. thieu nien cac luc va hanh vi ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky lang xa hoi. thieu nien cac luc va hanh vi ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky lang xa hoi. thieu nien cac luc va hanh vi ((cua tu) OR (cua su))*.