Perhaps you should try some spelling variations:
thong thuat » thuong thuat, trong thuat, thong thoat
chieu sang » chieu sach, chieu xanh, hieu lang
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
hieu van » hieu va, thien van, lieu va
anh manh » lanh manh, anh anh, anh danh
toan cau » 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 ((chieu sang) or (hieu van)) - anh manh ((cua thong) OR (cua khong)) thong thuat toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu van)) - anh manh ((cua thong) OR (cua khong)) thong thuat toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu van)) - anh manh ((cua thong) OR (cua khong)) thong thuat toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu van)) - anh manh ((cua thong) OR (cua khong)) thong thuat toan cau*.