Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hanh trinh » canh tranh, hanh chinh
thong cong » tong cong, thong thong, phong chong
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh va » trinh van, trinh vat, trinh ve
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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 danh - hanh trinh va ((thong cong) or (trong cong)) dan ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien danh - hanh trinh va ((thong cong) OR (trong cong)) dan ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc thien danh - hanh trinh va ((thong cong) or (trong cong)) dan ((than cau) or (than cap))*.