Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
dan vai » dan va, dan tai, den vai
dan vat » dang vat, van vat, dan va
co hoi » co hoc, co loi
va am » va lam, va cam

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoi. lieu va am thuc dan ((dan vai) OR (dan vat)) va triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoi. lieu va am thuc dan ((dan vai) OR (dan vat)) va triet*.