Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
thong than » thong thanh, thong phan, thong nhan
hanh tang » hanh trang, anh tang, hanh mang
than tuan » thanh tuan, tran tuan, thanh xuan
cua tong » cua dong, cua nong, cua song
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 tang ((cua tong) or (cua cong)) thong than tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - hanh tang ((cua tong) OR (cua cong)) thong than tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - hanh tang ((cua tong) or (cua cong)) thong than tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu quang)) - hanh tang ((cua tong) or (cua cong)) thong than tuan cau*.