Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh nung » thanh tung, thanh hung, thanh dung
cong luong » cong thuong, nang luong, cong dong
doi chiet » doi chieu, doi chi, doi viet
tang cong » tang cuong, trang cong, dang cong
luong ban » luong van, luong bac, luong san
nung cao » nang cao, nhung cau, quang cao
cao tang » cao dang
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - thanh nung cao tang cong luong ban cau~.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - thanh nung cao tang cong luong ban cau*.