Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
canh trang » canh tranh, banh trang, thanh trang
hanh trang » thanh trung, canh tranh, hanh trinh
thien anh » thien danh, tien anh, thien chanh
nang cong » nang song, dang cong, bang cong
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau
va nang » van nang, da nang, cam nang

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 anh) OR (thien thanh)) - ((canh trang) or (hanh trang)) va nang cong tac phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien thanh)) - ((canh trang) OR (hanh trang)) va nang cong tac phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) OR (thien thanh)) - ((canh trang) or (hanh trang)) va nang cong tac phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) OR (thien thanh)) - ((canh trang) or (hanh trang)) va nang cong tac phan dau*.