Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong thao » phuong phap, phuong thuc
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trang » canh tranh, hanh trinh, minh trang
doi chieu » doc hieu, doi chi, ho chieu
thao toan » thuat toan, thanh toan, tap toan
cua thoi » cua hoi, cua toi, cua khoi
toan cao » toan ban, toan tap
cua thi » cua toi, cua chi, cua phi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((hanh trang) OR (thanh trung)) ((cua thi) or (cua thoi)) phuong thao toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((hanh trang) OR (thanh trung)) ((cua thi) OR (cua thoi)) phuong thao toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((hanh trang) OR (thanh trung)) ((cua thi) or (cua thoi)) phuong thao toan cao*".