Perhaps you should try some spelling variations:
sach thuc » cach thuc, sach thu, sach thue
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
va triet » va thiet, va trien, ve triet
te sach » toc sach
hanh xa » hanh va, hanh ma, hanh xu
duc van » duc va, duc tan, duc manh
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
lam va » nam va, dam va, lam ha

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 thuc hanh xa hoi. hieu ((ve cam) OR (ve cac)) duc van hanh lam va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thuc hanh xa hoi. hieu ((ve cam) OR (ve cac)) duc van hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: te sach thuc hanh xa hoi. hieu ((ve cam) OR (ve cac)) duc van hanh lam va triet*.