Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
thieu tinh » trieu tinh, chieu tinh, thien tinh
tran trong » gian trong, tran hong
quan trong » gian trong
hoc thieu » toc thieu, hoc hien
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: hoc thieu tinh - thanh thanh ((tran trong) or (quan trong)) cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh thanh ((tran trong) OR (quan trong)) cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh thanh ((tran trong) or (quan trong)) cong san van ban*.