Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
bang ma » bang may, tang ma, ban ma
hieu va » lieu va, hieu qua
cac xuc » cac nuoc, chat xuc, cac cuoc
ma hoi » mai hoi, xa hoi, ma hoa
vi hoc » va hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu bang ma hoi. hieu va ((cac xuc) OR (cam xuc)) van hanh ((vi hoc) OR (li hoc)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu bang ma hoi. hieu va ((cac xuc) OR (cam xuc)) van hanh ((vi hoc) or (li hoc)) viet~".
• Adding a wildcard symbol may retrieve word variants: tu sach thu bang ma hoi. hieu va ((cac xuc) OR (cam xuc)) van hanh ((vi hoc) or (li hoc)) viet*.