Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
trinh van » trinh han, trinh quan, trinh toan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (toc thieu)) xanh - canh trinh van ((nhung cong) OR (thong cong)) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (toc thieu)) xanh - canh trinh van ((nhung cong) OR (thong cong)) dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (toc thieu)) xanh - canh trinh van ((nhung cong) OR (thong cong)) dan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (toc thieu)) xanh - canh trinh van ((nhung cong) OR (thong cong)) dan phan cau*.