Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
van thanh » ban thanh, van tuan
cho tre » cho thue, khoe tre
duc van » duc va, duc tan, duc manh
chu tre » chu tri, cuu tre, cau tren
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ky sang) or (ky dang)) xa hoi. hieu ve pham duc van thanh hai ((chu tre) OR (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky sang) OR (ky dang)) xa hoi. hieu ve pham duc van thanh hai ((chu tre) OR (cho tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky sang) or (ky dang)) xa hoi. hieu ve pham duc van thanh hai ((chu tre) OR (cho tre))".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky sang) or (ky dang)) xa hoi. hieu ve pham duc van thanh hai ((chu tre) OR (cho tre))*.