Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay tang » tay lang, tay trung, tay quang
so sach » so sanh, bo sach, co sach
van hoi » van hoc, van hoe, van loi
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi su » va su, ki su, oi su
ve su » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach tay tang ((van hoi) or (van hoa)). hieu va cac xuc va hanh ((vi su) OR (ve su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tay tang ((van hoi) OR (van hoa)). hieu va cac xuc va hanh ((vi su) OR (ve su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tay tang ((van hoi) or (van hoa)). hieu va cac xuc va hanh ((vi su) OR (ve su)) triet".
• Adding a wildcard symbol may retrieve word variants: so sach tay tang ((van hoi) or (van hoa)). hieu va cac xuc va hanh ((vi su) OR (ve su)) triet*.