Perhaps you should try some spelling variations:
trinh nhan » trinh han, trinh phan, trinh nha
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, hoc hien, hoc dieu
nhan thuc » nhan luc, dan thuc, toan thuc
hung cong » hung cuong, phung cong, dung cong
than phan » thanh phan, toan phan, thanh pham
ho chieu » theo chieu, hoc thieu, mot chieu
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) OR (ho chieu)) xanh - trinh nhan thuc ((hung cong) or (nhung cong)) than phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) xanh - trinh nhan thuc ((hung cong) OR (nhung cong)) than phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (ho chieu)) xanh - trinh nhan thuc ((hung cong) or (nhung cong)) than phan dau".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (ho chieu)) xanh - trinh nhan thuc ((hung cong) or (nhung cong)) than phan dau*.