Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
phan lap » phan dau
vat phan » va phan, van phan, sat phan
cau thuc » cau truc, cuu thuc, can thuc
hoc hoi » hoc khoi, hoc hoa, hoc noi
lap cua » lai cua, tap cua, lam cua
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, tu cach
hoi hoi » hoi hoc, hoi doi, doi hoi
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
va cau » van cau, va cac, va dau

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 (te sach)) ty nang ((hoi hoi) OR (hoc hoi)). hieu va cau thuc vat phan lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang ((hoi hoi) OR (hoc hoi)). hieu va cau thuc vat phan lap cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ty nang ((hoi hoi) OR (hoc hoi)). hieu va cau thuc vat phan lap cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang ((hoi hoi) OR (hoc hoi)). hieu va cau thuc vat phan lap cua triet*.