Perhaps you should try some spelling variations:
thu hanh » thuc hanh, thu thanh, thuy hanh
sach thu » sach thue, sach thieu, sach tham
thuc dan » thuc hanh, hoc dan, thuc vat
hanh lam » thanh lap, hanh kem, hanh va
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc day
ve cam » ve cham, ve cac, va cam
thiet » thieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu hanh xa hoi. hieu ve cam ((thuc va) OR (thuc dan)) hanh lam ((va triet) OR (va thiet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu hanh xa hoi. hieu ve cam ((thuc va) OR (thuc dan)) hanh lam ((va triet) or (va thiet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach thu hanh xa hoi. hieu ve cam ((thuc va) OR (thuc dan)) hanh lam ((va triet) or (va thiet))*.