Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
trinh tuan » trinh quan, trinh toan, trinh luan
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
bai toan » bai tap
toan ban » van ban

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 sang - hanh trinh tuan ((nhung cuong) or (hang cong)) bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh trinh tuan ((nhung cuong) OR (hang cong)) bai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh tuan ((nhung cuong) or (hang cong)) bai toan ban*.