Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
phan tap » phan lap, pha tap, phan tu
tung va » trung va, tuong va, dung va
han tap » han tai, toan tap, nhan tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung va ((phuong cong) OR (tong cong)) dan ((phan tap) OR (han tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh tung va ((phuong cong) or (tong cong)) dan ((phan tap) OR (han tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung va ((phuong cong) or (tong cong)) dan ((phan tap) OR (han tap))*.