Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
thanh trong » thanh trung, hanh trong, nhanh trong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
qua trong » quan trong, qua trinh, qua song
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
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 thieu xanh - ((thanh trong) OR (tranh trong)) qua trong cong ban toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((thanh trong) OR (tranh trong)) qua trong cong ban toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((thanh trong) OR (tranh trong)) qua trong cong ban toan cau*.