Perhaps you should try some spelling variations:
thanh nien » thanh nhan, thanh liem, thanh nguyen
thanh vien » nhan vien, thanh van
hoc sach » hoc sinh, hoc anh
dang xay » dang van, van xay
va cham » va chat, va tham
hieu va » lieu va, hieu qua
hoc cac » hoc cao
xay hoi » xa hoi, tay hoi, cay phoi
soc va » hoc va, loc va, doc va
o dang » xo dang, do dang, so dang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc cac)) o dang xay hoi. hieu va cham soc va ((thanh vien) or (thanh nien)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc cac)) o dang xay hoi. hieu va cham soc va ((thanh vien) OR (thanh nien)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc cac)) o dang xay hoi. hieu va cham soc va ((thanh vien) or (thanh nien)) cua tu".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc cac)) o dang xay hoi. hieu va cham soc va ((thanh vien) or (thanh nien)) cua tu*.