Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh van » tran van, trinh van, thanh van
nang cong » nang song, bang cong, hang cong
dang cong » dung cong
phan cac » nhan cach, phan lap, phan van
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 xanh - canh tranh van ((nang cong) OR (dang cong)) dan ((phan cac) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - canh tranh van ((nang cong) OR (dang cong)) dan ((phan cac) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - canh tranh van ((nang cong) OR (dang cong)) dan ((phan cac) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh tranh van ((nang cong) OR (dang cong)) dan ((phan cac) or (phan dau))*.