Perhaps you should try some spelling variations:
thien van » thi van
cau treo » cau theo, cau tren, cau triet
so sach » so sanh, bo sach, co sach
sach le » cach le, sach de, sach lo
quang x » quang _, quang d, quang xuc
quang y » quan y, quang _, quang d
van bac » van ban, van bao, van hac
bac luc » bao luc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
vi cau » va cau, ve cau, di cau

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 le ((quang x) OR (quang y)) ho. thien van bac luc va hanh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach le ((quang x) OR (quang y)) ho. thien van bac luc va hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: so sach le ((quang x) OR (quang y)) ho. thien van bac luc va hanh vi cau treo*.