Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
tung cap » trung cap, cung cap, thong cap
cap bang » cao bang, can bang, lap bang
cong van » cong vang, cong san, song van
tuan tai » toan tai, quan tai, tan tai
so lieu » so dieu

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) or (so lieu)) tinh - thanh tung cap bang ((cong van) or (cong quang)) tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (so lieu)) tinh - thanh tung cap bang ((cong van) OR (cong quang)) tuan tai.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (so lieu)) tinh - thanh tung cap bang ((cong van) or (cong quang)) tuan tai*.