Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » hoc hien
trung he » trung ha, trong he, trung hieu
he trong » he thong, he trung, le trong
cong san » cong tac
san than » sang than, san thanh, ban than
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) or (toc thieu)) xanh - thanh trung he trong cong san than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - thanh trung he trong cong san than ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - thanh trung he trong cong san than ban*.