Perhaps you should try some spelling variations:
chung cong » chong cong, phung cong, chung thong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
canh manh » lanh manh, canh tranh, cach mang
trinh san » trinh han, trinh quan, trinh toan
manh cua » doanh cua, ban cua
san lap » sang lap, dan lap, sai lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (hoc thieu)) sach - canh manh cua ((chung cong) OR (nhung cong)) trinh san lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) sach - canh manh cua ((chung cong) OR (nhung cong)) trinh san lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (hoc thieu)) sach - canh manh cua ((chung cong) OR (nhung cong)) trinh san lap".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) sach - canh manh cua ((chung cong) OR (nhung cong)) trinh san lap*.