Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, pham duc
cua nuoc » cua quoc, cua nguoi, cua thuoc
dang xay » dang van, van xay
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua
ang xa » lang xa, mang xa, hoang xa

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 ty ((ang xa) or (dang xay)) hoi. lieu va ((cham xuc) or (cham soc)) van hanh tai cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((ang xa) OR (dang xay)) hoi. lieu va ((cham xuc) OR (cham soc)) van hanh tai cua nuoc.
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((ang xa) or (dang xay)) hoi. lieu va ((cham xuc) or (cham soc)) van hanh tai cua nuoc*.