Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
thuc dang » thuoc dang, thuc dan, thuc dung
tai cua » thai cua, tai cuc, tri cua
hieu ha » hieu hoa, hieu va, hieu ca
su sach » so sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vu sach » vu bach, vu khach
ha am » hoa am, ha nam, ha lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu ha am thuc dang thanh tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky ((nang xa) OR (nang ma)) hoi. hieu ha am thuc dang thanh tai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky ((nang xa) or (nang ma)) hoi. hieu ha am thuc dang thanh tai cua triet*".