Perhaps you should try some spelling variations:
thinh khong » tinh khong, trinh khong, thi khong
thieu hach » thien hach, chieu sach, hieu cach
nhan cach » phan cac
gian dan » gian lang
dan cong » dang cong, van cong, dan dong
cong dan » cong san, cong tan, huong dan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu hach - thinh khong gian dan cong dan ((phan lap) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - thinh khong gian dan cong dan ((phan lap) OR (nhan cach))*.