Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
va triet » va trien, ve triet, cua triet
nam thuc » nam thuoc, am thuc, nam thu
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
ve nam » he nam, va nam, le nam
thiet » thieu

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 thi hanh xa hoi. hieu ve nam thuc ((va hanh) or (va danh)) lam ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu ve nam thuc ((va hanh) OR (va danh)) lam ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu ve nam thuc ((va hanh) or (va danh)) lam ((va triet) or (va thiet))*.