Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
thi hong » thi cong, thi phuong, thi hanh
sach thi » sach thu, sach tai, sach thieu
tuc gia » tac gia, duc gia, toc gia
te sach » toc sach
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
co hoi » co hoc, co loi

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 thi hong ((co hoi) or (xa hoi)). hieu va cac tuc gia thanh tai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thi hong ((co hoi) OR (xa hoi)). hieu va cac tuc gia thanh tai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thi hong ((co hoi) or (xa hoi)). hieu va cac tuc gia thanh tai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: te sach thi hong ((co hoi) or (xa hoi)). hieu va cac tuc gia thanh tai ((cua triet) OR (va triet))*.