Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, thanh thao
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
duoc gia » duoc giao, quoc gia, duc gia
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky tang ma hoa. hieu van nam duoc gia ((thanh thai) or (nhanh thai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky tang ma hoa. hieu van nam duoc gia ((thanh thai) OR (nhanh thai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ky tang ma hoa. hieu van nam duoc gia ((thanh thai) or (nhanh thai)) cua triet*.