Perhaps you should try some spelling variations:
ky thanh » ky hanh, ty thanh, kim thanh
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
y thanh » ty thanh, _ thanh, o thanh
thuy ho » thuy hoa, thuy do, thuy hu
cam luc » cau luc
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: tu sach ((ky thanh) OR (y thanh)) thuy ho. lieu va ((cam luc) or (cam xuc)) van hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky thanh) OR (y thanh)) thuy ho. lieu va ((cam luc) OR (cam xuc)) van hanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky thanh) OR (y thanh)) thuy ho. lieu va ((cam luc) or (cam xuc)) van hanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky thanh) OR (y thanh)) thuy ho. lieu va ((cam luc) or (cam xuc)) van hanh vi cau tren*.