Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
canh manh » lanh manh, canh tranh, cach mang
cua trong » cua truong, cua trung, ca trong
qua trong » quan trong, qua trinh, qua song
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang 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 hien xanh - canh manh ((cua trong) OR (qua trong)) cong vang toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh manh ((cua trong) OR (qua trong)) cong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh manh ((cua trong) OR (qua trong)) cong vang toan cau*.