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

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 va ((cham xuc) or (cham soc)) ((van hanh) OR (ban hanh)) tai cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ang xa hoi. hieu va ((cham xuc) OR (cham soc)) ((van hanh) OR (ban hanh)) tai cua nuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty ang xa hoi. hieu va ((cham xuc) or (cham soc)) ((van hanh) OR (ban hanh)) tai cua nuoc".
• Adding a wildcard symbol may retrieve word variants: toc sach ty ang xa hoi. hieu va ((cham xuc) or (cham soc)) ((van hanh) OR (ban hanh)) tai cua nuoc*.