Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
thanh vai » thanh hai, thanh van, thanh tai
va triet » va thiet, va trien, ve triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nuoc gia » nuoc giai, nuoc giao, quoc gia
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang ((x hoi) OR (xa hoi)). hieu ve cac nuoc gia thanh vai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((x hoi) OR (xa hoi)). hieu ve cac nuoc gia thanh vai ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((x hoi) OR (xa hoi)). hieu ve cac nuoc gia thanh vai ((cua triet) or (va triet))*".