Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau thuc » cau truc, cuu thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
vu sach » vu bach, su sach, vu khach
ty lang » tay lang, ty xang, tu lang
ty hang » ly hang, ty xang, thi hang
hieu ke » hieu kem, chieu ke, hieu ky
ke cau » ket cau
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ty lang) or (ty hang)) xa hoi. hieu ke cau thuc vat hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty lang) OR (ty hang)) xa hoi. hieu ke cau thuc vat hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty lang) or (ty hang)) xa hoi. hieu ke cau thuc vat hanh vi cua triet*.