Perhaps you should try some spelling variations:
thien van » thi van
thanh mai » thanh hai, thanh tai, thanh moi
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
nam luc » nang luc, nhan luc, nam thuc
luc gia » luoc gia, duc gia, quoc gia

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((nang xa) or (nang x)) hoi. thien van nam luc gia thanh mai ((va triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. thien van nam luc gia thanh mai ((va triet) OR (va trien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (nang x)) hoi. thien van nam luc gia thanh mai ((va triet) OR (va trien))*".