Perhaps you should try some spelling variations:
thanh nhanh » thanh nhan, thanh thanh, thanh phan
nhung doanh » nhung danh, dung doanh, nhung don
cong thanh » dong thanh, cong trinh, cong tan
cua trong » cua truong, cua trung, ca trong
qua trong » quan trong, qua trinh, qua song
nhanh cau » nhanh cay, thanh chau, nhanh ha
theo chu » theo chieu, cho chu, chao chu

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