Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
cap nhung » cam nhung, vap nhung, dap nhung
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan nan » chan nhan, chang nang, chan doan

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) OR (hien nhanh)) - thanh trung ((cap nhung) or (va nhung)) cong dan chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - thanh trung ((cap nhung) OR (va nhung)) cong dan chan nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - thanh trung ((cap nhung) or (va nhung)) cong dan chan nan".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien nhanh)) - thanh trung ((cap nhung) or (va nhung)) cong dan chan nan*.