Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
hoi cua » hoi chuc
cam luc » cam xuc, cau luc
ve cam » ve cham, ve cac, va cam
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
ke san » ke dan
te san » te ban, tu san, ta san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te san) or (ke san)) ky nang x ho. hieu ve cam luc ((va dan) OR (ca dan)) hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te san) OR (ke san)) ky nang x ho. hieu ve cam luc ((va dan) OR (ca dan)) hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te san) or (ke san)) ky nang x ho. hieu ve cam luc ((va dan) OR (ca dan)) hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te san) or (ke san)) ky nang x ho. hieu ve cam luc ((va dan) OR (ca dan)) hoi cua tre*.