Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
nuoc sach » nguoi sach, hoc sach, cuoc cach
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
vat danh » va danh, van danh, luat danh
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
danh di » danh du, xanh di, danh dien
di cua » dai cua, doi cua, de cua

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) or (nuoc sach)) ky lang ha noi. hieu van tham thuc vat danh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (nuoc sach)) ky lang ha noi. hieu van tham thuc vat danh di cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (nuoc sach)) ky lang ha noi. hieu van tham thuc vat danh di cua triet*.