Perhaps you should try some spelling variations:
bach benh » mach benh, cac benh, benh benh
cau treo » cau theo, cau tren, cau triet
thi hanh » thi thanh
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
sach le » cach le, sach de, sach lo
quang x » quang _, quang d, quang y
thi van » thi lan, thi nang
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: su ((sach le) or (bach benh)) quang x ho. ((thi van) OR (thi hanh)) cac luc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach le) OR (bach benh)) quang x ho. ((thi van) OR (thi hanh)) cac luc va hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach le) or (bach benh)) quang x ho. ((thi van) OR (thi hanh)) cac luc va hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: su ((sach le) or (bach benh)) quang x ho. ((thi van) OR (thi hanh)) cac luc va hanh vi cau treo*.