Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » hoc hien
trinh qua » trinh quan, trinh cua, trinh quang
qua chung » qua chuong, quat chung, cua chung
cong tac » cong ty
song van » hoang van, trong van, duong van
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) OR (toc thieu)) xanh - hanh trinh qua chung ((cong tac) or (song van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - hanh trinh qua chung ((cong tac) OR (song van)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (toc thieu)) xanh - hanh trinh qua chung ((cong tac) or (song van)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (toc thieu)) xanh - hanh trinh qua chung ((cong tac) or (song van)) toan cau*.