Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
canh thanh » danh thanh, anh thanh, nhanh thanh
phan nhung » phan chung, phan hung, pha nhung
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
cong toan » cong tan, cong hoan, cong tuan
bang cau » hang cau, bang cac, nang cao
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien thanh - ((canh thanh) or (canh tranh)) phan nhung cong toan ((bang cau) or (van cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - ((canh thanh) OR (canh tranh)) phan nhung cong toan ((bang cau) OR (van cau)).
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - ((canh thanh) or (canh tranh)) phan nhung cong toan ((bang cau) or (van cau))*.