Perhaps you should try some spelling variations:
thanh tung » thanh cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tung quan » tuong quan, trung quan, dung quan
quan dung » quang dung, quan duong, qua dung
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan tap » tuan tai, tuyen tap, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh tung quan dung ((cong van) or (cong san)) ((tuan tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh tung quan dung ((cong van) OR (cong san)) ((tuan tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh tung quan dung ((cong van) or (cong san)) ((tuan tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh tung quan dung ((cong van) or (cong san)) ((tuan tap) OR (toan tap))*.