Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
dung cong » dung trong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
hanh va » hang va, hanh vi
han va » hang va, nhan va, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (chieu sang)) - hanh ((han va) or (hanh va)) dung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chieu sang)) - hanh ((han va) OR (hanh va)) dung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chieu sang)) - hanh ((han va) or (hanh va)) dung cong van toan ban*.