Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thien nang » thien bang, thien dang, trien nang
thien anh » thien danh, tien anh, thien thanh
cong cong » cong dong, trong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
va cong » tai cong, cua cong

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 nang) or (thien anh)) - hanh trinh va cong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien nang) OR (thien anh)) - hanh trinh va cong cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien nang) or (thien anh)) - hanh trinh va cong cong dan toan ban*.