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
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
vat phan » va phan, van phan, sat 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 hieu manh - canh trinh va ((nhung cong) or (thong cong)) vat phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh trinh va ((nhung cong) OR (thong cong)) vat phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh trinh va ((nhung cong) or (thong cong)) vat phan cau*.