Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong ngang » thong nang, thong ngan, trong ngang
chieu sang » chieu sach, chieu xanh, hieu lang
phap thong » phap phong, phap chong, pho thong
doi chieu » doc hieu, doi chi, ho chieu
dap thong » khap thong, va thong, sau thong
toan cao » toan ban
toan tap » toan ban

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 - thanh trung ((dap thong) or (phap thong)) thong ngang ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ((dap thong) OR (phap thong)) thong ngang ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung ((dap thong) or (phap thong)) thong ngang ((toan cao) or (toan tap))*.