Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trung chan » trung phan, trong chan, trung can
hieu manh » chieu xanh, hieu nganh, dieu hanh
chan dung » van dung, dan dung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (((chieu sang) OR (chieu sach)))) - thanh trung chan dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (((chieu sang) OR (chieu sach)))) - thanh trung chan dung cong tan toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (((chieu sang) OR (chieu sach)))) - thanh trung chan dung cong tan toan cau*".