Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
su tien » su kien, su hien, tu tieng
ve cam » ve cham, ve cac, va cam
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao

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