Perhaps you should try some spelling variations:
sach thuy » sach thu, sach thue, sach tham
thuy hanh » thuc hanh, thuy anh, thuy canh
va triet » va thiet, va trien, ve triet
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
ve cai » va cai, ve tai, ve cau
dam va » dam van, nam va, dam 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: tu sach thuy hanh xa hoi. hieu ((ve cai) or (ve cac)) xuc ((va hanh) or (va danh)) dam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thuy hanh xa hoi. hieu ((ve cai) OR (ve cac)) xuc ((va hanh) OR (va danh)) dam va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thuy hanh xa hoi. hieu ((ve cai) or (ve cac)) xuc ((va hanh) or (va danh)) dam va triet*.