Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
nhung tuong » nhung phuong, hung vuong, nhung cong
nhung huong » nhung phuong, nhung cong, nhung dung
thieu sang » chieu sang, thieu khang, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sang) or (thieu quang)) - hanh trung tuan ((nhung tuong) OR (nhung huong)) anh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - hanh trung tuan ((nhung tuong) OR (nhung huong)) anh tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu quang)) - hanh trung tuan ((nhung tuong) OR (nhung huong)) anh tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu quang)) - hanh trung tuan ((nhung tuong) OR (nhung huong)) anh tuan cau*.