Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu tinh » chieu tinh, kieu tinh, hieu binh
lieu tinh » trieu tinh, diep tinh, bien tinh
nang cong » nang song, dang cong, bang cong
kha nang » phap nang, ky nang, ki nang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu tinh) or (lieu tinh)) - ((thanh trung) OR (thanh tung)) kha nang cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (lieu tinh)) - ((thanh trung) OR (thanh tung)) kha nang cong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tinh) or (lieu tinh)) - ((thanh trung) OR (thanh tung)) kha nang cong dan than ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) or (lieu tinh)) - ((thanh trung) OR (thanh tung)) kha nang cong dan than ban*.