Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
hien tinh » khien tinh, thien tinh, bien tinh
thuat cam » thuat dam, thuat chan, thuat xay
cong tan » cong tac, cong san, cong thanh
tan bang » tang bang, tuan bang, can bang
song van » hoang van, trong van, duong van
tuan cap » than cap, thuan cam, toan cao

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 tinh - thanh cong tan bang ((cong luong) or (song van)) ((tuan cap) or (thuat cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - thanh cong tan bang ((cong luong) OR (song van)) ((tuan cap) OR (thuat cam)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - thanh cong tan bang ((cong luong) or (song van)) ((tuan cap) or (thuat cam))*.