Perhaps you should try some spelling variations:
cong thang » cong thanh, cang thang, cong thong
thang phan » thanh phan, thong phan, than phan
phan cong » thanh cong
dung dat » dung va, dung tai
dat phan » data phan, dam phan, sat phan
phan lap » phan dau
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chi) or (toc thieu)) sang - sach dung dat phan cong thang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chi) OR (toc thieu)) sang - sach dung dat phan cong thang phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doi chi) or (toc thieu)) sang - sach dung dat phan cong thang phan lap*.