Perhaps you should try some spelling variations:
thieu nien » thien nhien
van hanh » van thanh, ban hanh, van anh
cap nuoc » dat nuoc
nien cap » nien lap, vien cac, vien cao
thu sach » thuat sach, thuoc sach, thu hoach
dang xay » dang van, van xay
xay hoi » xa hoi, tay hoi, cay phoi
ty dang » ty xang, ky dang, ty hang
va hanh » va thanh, va danh, ban hanh
tu sach » su sach, te sach, tu cach
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) ty dang xay hoi. thieu nien cap nuoc ((va hanh) or (van hanh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ty dang xay hoi. thieu nien cap nuoc ((va hanh) OR (van hanh)) dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty dang xay hoi. thieu nien cap nuoc ((va hanh) or (van hanh)) dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty dang xay hoi. thieu nien cap nuoc ((va hanh) or (van hanh)) dai cua te*.