Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
cua nuoc » cua quoc, cua nguoi, cua thuoc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
hieu va » lieu va, hieu qua
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay

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 hoi. ((hieu ve) OR (hieu va)) ((cam xuc) OR (cham soc)) van hanh tri cua nuoc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty ang xa hoi. ((hieu ve) OR (hieu va)) ((cam xuc) OR (cham soc)) van hanh tri cua nuoc".
• Adding a wildcard symbol may retrieve word variants: toc sach ty ang xa hoi. ((hieu ve) OR (hieu va)) ((cam xuc) OR (cham soc)) van hanh tri cua nuoc*.