Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
hanh xa » hanh va, hanh ma, hanh xu
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
de tai » de thi, te tai
tuc va » thuc va, truc va, tuc xa
nam ha » nam a, nam va, nam da
am va » nam va, dam va, cam va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach thi hanh xa hoi. hieu ((de tai) or (ve cham)) tuc va hanh ((am va) or (nam ha)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thi hanh xa hoi. hieu ((de tai) OR (ve cham)) tuc va hanh ((am va) OR (nam ha)) triet.
• Adding a wildcard symbol may retrieve word variants: thu sach thi hanh xa hoi. hieu ((de tai) or (ve cham)) tuc va hanh ((am va) or (nam ha)) triet*.