Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thanh » truong thanh
thanh dang » thanh hang, thanh dan, thanh dong
dang cong » dung cong
khi xanh » khia canh, thi hanh, thi anh
cong tac » cong ty
tren cau » tren ca, tren cay, tren tau
ten cay » tren cay, gen cay, trien cay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi xanh - thanh trung thanh dang cong tac ((tren cau) OR (ten cay))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi xanh - thanh trung thanh dang cong tac ((tren cau) OR (ten cay))".
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - thanh trung thanh dang cong tac ((tren cau) OR (ten cay))*.