Perhaps you should try some spelling variations:
phong thuong » thong thuong, phong tuong, hang thuong
thuong manh » thuong mach, thuong nganh, thuong mai
chieu sang » chieu sach, chieu xanh, hieu lang
quang tuan » quang thanh, quan luan, quang cua
hien sang » hien trang, khien bang, thien bang
tung tuan » trung tuan, hung tuan, trang tuan
manh toan » thanh toan, anh tuan, tinh toan
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: hoc ((hien sang) or (chieu sang)) - thanh ((tung tuan) OR (quang tuan)) phong thuong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (chieu sang)) - thanh ((tung tuan) OR (quang tuan)) phong thuong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) or (chieu sang)) - thanh ((tung tuan) OR (quang tuan)) phong thuong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) or (chieu sang)) - thanh ((tung tuan) OR (quang tuan)) phong thuong manh toan cao*.