Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
tuong qua » tuong quan, duong qua, thong qua
dung cong » dung trong
cong ngan » cong ngang, cong nhan, dong ngan
qua dung » quang dung, su dung, qua song
nang va » nang van, hang va, bang va
nang ma » tang ma, sang ma, nang cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) xanh - thanh tuong qua dung cong ngan ((nang va) OR (nang ma))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doi chieu)) xanh - thanh tuong qua dung cong ngan ((nang va) OR (nang ma))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) xanh - thanh tuong qua dung cong ngan ((nang va) OR (nang ma))*.