Perhaps you should try some spelling variations:
thanh trung » thanh tung
khien tinh » thien tinh, khien thich, bien tinh
hoc khien » hoc hien, hoc nghien, hoc thieu
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
thanh bai » thanh hai, thanh tai, thanh oai
cong van » cong san, song van, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien tinh - thanh trung cua nhung ((cong van) or (cong vang)) thanh bai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - thanh trung cua nhung ((cong van) OR (cong vang)) thanh bai.
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - thanh trung cua nhung ((cong van) or (cong vang)) thanh bai*.