Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
kiem va » kien va, kiem tra, nhiem va
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
hanh xa » hanh va, hanh ma, hanh xu
ve cham » va cham, ve chat, vu cham
tuc va » thuc va, truc va, tuc xa
ve cam » ve cac, va cam, ve cai
kem va » kiem van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi hanh xa hoi. hieu ((ve cam) or (ve cham)) tuc va danh ((kem va) OR (kiem va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi hanh xa hoi. hieu ((ve cam) OR (ve cham)) tuc va danh ((kem va) OR (kiem va)) trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi hanh xa hoi. hieu ((ve cam) or (ve cham)) tuc va danh ((kem va) OR (kiem va)) trien".
• Adding a wildcard symbol may retrieve word variants: su sach thi hanh xa hoi. hieu ((ve cam) or (ve cham)) tuc va danh ((kem va) OR (kiem va)) trien*.