Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
ha thanh » va thanh, pham thanh, phan thanh
xa thanh » va thanh, ta thanh, gia thanh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach ty
ve cau » ke cau, va cau, ve cac
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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) or (sach tu)) nang x hoi. hieu va cam xuc ((xa thanh) OR (ha thanh)) ve cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach tu)) nang x hoi. hieu va cam xuc ((xa thanh) OR (ha thanh)) ve cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach tu)) nang x hoi. hieu va cam xuc ((xa thanh) OR (ha thanh)) ve cau theo".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach tu)) nang x hoi. hieu va cam xuc ((xa thanh) OR (ha thanh)) ve cau theo*.