Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
hanh lam » thanh lap, hanh kem, hanh va
va triet » va thiet, va trien, ve triet
thu hanh » thuc hanh, thu thanh, thuy hanh
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, duc va
lam va » nam va, dam va, lam ha
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: ((thu sach) OR (thuoc sach)) thu hanh xa hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) thu hanh xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) thu hanh xa hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) thu hanh xa hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh lam va triet*.