Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
tuan quang » quan quang, than quang, xuan quang
trong dung » thong dung, trung dung, trong rung
dung dan » dung dat, dung san, tung dan
dan cho » danh cho, san cho, dac cho

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 xanh) or (chieu sach)) - hanh trinh ((tuan quang) OR (tran quang)) trong dung dan cho~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sach)) - hanh trinh ((tuan quang) OR (tran quang)) trong dung dan cho.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - hanh trinh ((tuan quang) OR (tran quang)) trong dung dan cho".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - hanh trinh ((tuan quang) OR (tran quang)) trong dung dan cho*.