Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thuc phung » thuc chung, thuc nhung, thu phuong
phung cong » nhung cong, phong cong, nhung chong
hoc thieu » toc thieu, hoc hien
toan thuc » toan hoc, dan thuc, nhan thuc
cong than » cong thanh, cong thang, cong tan
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 thieu xanh - tinh toan thuc phung cong than ((phan lap) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - tinh toan thuc phung cong than ((phan lap) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - tinh toan thuc phung cong than ((phan lap) OR (phan dau))*.