Perhaps you should try some spelling variations:
thi hanh » thi thanh
hanh lam » thanh lap, hanh kem, hanh va
sach thi » sach thu, sach tai, sach thieu
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
lam va » nam va, dam va, lam ha
ve cac » va cac, vien cac
ve cai » va cai, ve tai, ve cau
ve cam » ve cham, va cam, ve cau
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 cam) or (ve cai))) or (ve cac)) luc va hanh lam va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu ((((ve cam) OR (ve cai))) OR (ve cac)) luc va hanh lam va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu ((((ve cam) or (ve cai))) or (ve cac)) luc va hanh lam va thiet*.