Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than ban » thanh ban, toan ban, than man

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 sang - ((((thanh trung) or (hanh trinh))) or (canh tranh)) va nhung cong ban than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((((thanh trung) OR (hanh trinh))) OR (canh tranh)) va nhung cong ban than ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((((thanh trung) or (hanh trinh))) or (canh tranh)) va nhung cong ban than ban*.