Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thuc dan » thuc hanh, hoc dan, thuc vat
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vai cua » hai cua, lai cua, bai cua
doi cua » hoi cua
so dac » so dan
dac ky » cac ky, dan ky, sac ky
ve am » va am

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so dac ky nang xa hoi. hieu ve am thuc dan thanh ((((vai cua) OR (dai cua))) OR (doi cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so dac ky nang xa hoi. hieu ve am thuc dan thanh ((((vai cua) OR (dai cua))) or (doi cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: so dac ky nang xa hoi. hieu ve am thuc dan thanh ((((vai cua) OR (dai cua))) or (doi cua)) tre*.