Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va hanh » va thanh, va danh, dao hanh
dan ky » van ky
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuc dan ky nang xa hoi. hieu ve cac duc ((van hanh) or (((va hanh) OR (ban hanh)))) di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc dan ky nang xa hoi. hieu ve cac duc ((van hanh) OR (((va hanh) OR (ban hanh)))) di cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuc dan ky nang xa hoi. hieu ve cac duc ((van hanh) or (((va hanh) OR (ban hanh)))) di cua su".
• Adding a wildcard symbol may retrieve word variants: thuc dan ky nang xa hoi. hieu ve cac duc ((van hanh) or (((va hanh) OR (ban hanh)))) di cua su*.