Perhaps you should try some spelling variations:
sach nuoc » cac nuoc, bach tuoc, dich nuoc
sach duoc » sach dao, sach dung, sinh duoc
sang tao » hang tai
cua viet » ca viet, hoa viet, cua dieu
hanh doi » thanh doi, hanh noi, hang doi
so sanh » do sanh
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu vu » hieu va, hieu ve, hieu su
sanh ky » hanh ky, sang ky, nganh ky
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky sang tao hoi. hieu vu ((sach nuoc) or (sach duoc)) va hanh doi ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky sang tao hoi. hieu vu ((sach nuoc) OR (sach duoc)) va hanh doi ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky sang tao hoi. hieu vu ((sach nuoc) or (sach duoc)) va hanh doi ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: so sanh ky sang tao hoi. hieu vu ((sach nuoc) or (sach duoc)) va hanh doi ((cua viet) OR (cua vat))*.