Perhaps you should try some spelling variations:
thi hanh » thi thanh
sach thi » sach thu, sach tai, sach thieu
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
ve chat » va chat, van chat
xa hanh » xa thanh, xa khanh, va hanh
ve cac » va cac, vien cac
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 cac) or (ve chat)) tuc xa hanh 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 cac) OR (ve chat)) tuc xa hanh lam ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu ((ve cac) or (ve chat)) tuc xa hanh lam ((va triet) or (va thiet))*.