Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu vien » hieu hien, hieu viec, thieu nien
thanh te » thanh ve, thanh de, thanh le
xa thanh » va thanh, ha thanh, ta thanh
vien cac » vien bach, vien dai, vien da
va triet » va thiet, va trien, ve triet
cac tac » cac toc, cac bac, cac dac
ty nang » ky nang, ty xang, ty hang
tac xa » tuc xa, tac da
o hoi » co hoi, o hai, o hoa
te va » tu va
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (cuoc cach)) ty nang ((o hoi) OR (o hoc)). hieu vien cac tac xa thanh te va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (cuoc cach)) ty nang ((o hoi) OR (o hoc)). hieu vien cac tac xa thanh te va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (cuoc cach)) ty nang ((o hoi) OR (o hoc)). hieu vien cac tac xa thanh te va triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (cuoc cach)) ty nang ((o hoi) OR (o hoc)). hieu vien cac tac xa thanh te va triet*.