Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hieu nganh » vien nganh, hiem ngan, hieu manh
phuong lan » phuong la, thuong lan, phuong linh
lan thanh » luan thanh, lang thanh, ban thanh
thanh cau » thanh chau, thanh mau, nhanh cau
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (thien thanh)) - canh tranh ((cua dung) OR (cua dong)) phuong lan thanh cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (thien thanh)) - canh tranh ((cua dung) OR (cua dong)) phuong lan thanh cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (thien thanh)) - canh tranh ((cua dung) OR (cua dong)) phuong lan thanh cau*.