Perhaps you should try some spelling variations:
thanh tung » thanh cong
thieu xanh » chieu xanh, hieu manh, thien danh
phung cong » nhung cong, phong cong, nhung chong
thien anh » thien danh, tien anh, thien thanh
va phung » va phuong, van phung, va nhung
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
tung va » trung va, tuong va, dung va
khan ap » khan cap, han ap, khan dam

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) or (thien anh)) - thanh tung va phung cong tan khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh tung va phung cong tan khan ap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - thanh tung va phung cong tan khan ap*.