Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
vanh dai » van dai, vanh tai, lanh dao
thu sach » thuat sach, thuoc sach, thu hoach
va vanh » va van, va danh, va hanh
thuc va » thuc vat, thuc dan, thuc day
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van am » van nam, van lam, van dam

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) or (thu sach)) ky ((nang xa) OR (nang ma)) hoi. thien van am thuc va vanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (nang ma)) hoi. thien van am thuc va vanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky ((nang xa) OR (nang ma)) hoi. thien van am thuc va vanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky ((nang xa) OR (nang ma)) hoi. thien van am thuc va vanh dai cua triet*.