Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
nang tay » nang tai, nang tao, bang tay
su triet » su viet, su tien, ve triet
te sach » toc sach
tay hoi » tay ho, tao hoi, tay thai
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi su » va su, ve su, ki su

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 (hoc sach)) ky nang tay hoi. hieu va cham thuc va danh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky nang tay hoi. hieu va cham thuc va danh vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang tay hoi. hieu va cham thuc va danh vi su triet*.