Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
hieu van » hieu va, thien van, lieu va
hanh tri » thanh tri, hanh tai, hanh trinh
sach ty » sach y, sach tu, sach thu
hang xa » hoang xa, hang va, hang ca
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
su viet » so viet
xuc va » duc va, tuc va, luc va
tri su » tri du, tai su, trinh su

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 ty) or (sach doi)) hang xa hoi. hieu van cam xuc va hanh tri su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach doi)) hang xa hoi. hieu van cam xuc va hanh tri su viet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach doi)) hang xa hoi. hieu van cam xuc va hanh tri su viet*.