Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
dang cong » dung cong
cong dang » cong dong, cong dan, cong dung
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai
tranh va » tranh van, trang va, trinh va
va dang » van dang, va nang, va lang

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 (doi chieu)) xanh - canh tranh va dang cong dang ((thanh tap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) xanh - canh tranh va dang cong dang ((thanh tap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - canh tranh va dang cong dang ((thanh tap) or (thanh lap))*.