Perhaps you should try some spelling variations:
cung thang » cang thang, hung thang, dung thang
thieu hach » thien hach, chieu sach, hieu cach
manh dung » manh hung, manh tung, anh dung
dung che » dung chet, duong che, dung cho
che cong » cho cong, chi cong, he cong
dung dat » dung va, dung tai
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 - manh dung che cong ((cung thang) or (dung dat)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - manh dung che cong ((cung thang) OR (dung dat)) phan lap.
• Adding a wildcard symbol may retrieve word variants: toc thieu hach - manh dung che cong ((cung thang) or (dung dat)) phan lap*.