Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tri nang » thi nang, tra nang, tri bang
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
va qua » va quan, va quy, va quang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) tri nang x hoi. hieu ve cac xuc va hanh va qua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) tri nang x hoi. hieu ve cac xuc va hanh va qua su".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) tri nang x hoi. hieu ve cac xuc va hanh va qua su*.