Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
xa khanh » xa thanh, van khanh, dat khanh
hanh xa » hanh va, hanh ma, hanh xu
hieu va » lieu va, hieu qua
cac toc » cac nuoc, cac thoi
cac toi » cac thoi
hai cua » thai cua, hoi cua, lai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thi hanh xa hoi. hieu va ((cac toc) or (cac toi)) xa khanh ((dai cua) or (hai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thi hanh xa hoi. hieu va ((cac toc) OR (cac toi)) xa khanh ((dai cua) OR (hai cua)) viet.
• Adding a wildcard symbol may retrieve word variants: toc sach thi hanh xa hoi. hieu va ((cac toc) or (cac toi)) xa khanh ((dai cua) or (hai cua)) viet*.