Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, nuoc sach
cac thau » cac thu, cay thau, cac thanh
su triet » su viet, ve triet
hanh tai » thanh tai, hang tai, han tai
xay hanh » day nhanh, day thanh, xanh hanh
thau xay » thuat xay, tu xay, phan xay
co sach » bo sach, hoc sach
su tien » su kien, su hien, tu tieng
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (cuon sach)) ty nang ma hoa. hieu ve cac thau xay hanh tai ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (cuon sach)) ty nang ma hoa. hieu ve cac thau xay hanh tai ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (cuon sach)) ty nang ma hoa. hieu ve cac thau xay hanh tai ((su triet) or (su tien))*.