Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
than sinh » than kinh, nhan sinh, phan sinh
thai sinh » thai binh, phai sinh, tai sinh
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu tinh) or (lieu tinh)) - ((than sinh) OR (thai sinh)) va nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (lieu tinh)) - ((than sinh) OR (thai sinh)) va nhung cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) or (lieu tinh)) - ((than sinh) OR (thai sinh)) va nhung cong san van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) or (lieu tinh)) - ((than sinh) OR (thai sinh)) va nhung cong san van ban*.