Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
chieu sang » chieu sach, chieu xanh, hieu lang
nhung dung » phuong dung, ung dung, thong dung
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
dung manh » duong manh, dung danh, hung manh
manh cua » doanh cua, ban cua
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

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 (thieu quang)) - canh manh cua nhung dung manh ((tuan cau) OR (tuan cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (thieu quang)) - canh manh cua nhung dung manh ((tuan cau) OR (tuan cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (thieu quang)) - canh manh cua nhung dung manh ((tuan cau) OR (tuan cu))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (thieu quang)) - canh manh cua nhung dung manh ((tuan cau) OR (tuan cu))*.