Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
phan lap » phan dau
van phan » van phong, van thanh, luan phan
thuc van » thuc vat, thuc dan, thuc va
nang ho » nang hoc, nang co, tang ho
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
su sach » so sach, vu sach
te sach » toc sach
lap cua » lai cua, tap cua, lam cua
tu sach » thu sach, tu cach, vu sach
y nang » ky nang, ly nang, v nang
ho hoi » hoc hoi, hoa hoi, hoi hoi

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