Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
trung va » truong va, trang va, trung ha
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam

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 - thanh ((trung va) or (trung cap)) phuong cong ban khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((trung va) OR (trung cap)) phuong cong ban khan cap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung va) or (trung cap)) phuong cong ban khan cap*.