Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu
dung cong » dung trong
trinh ve » trinh he, trinh va, trinh vi
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan
ve dung » ve duong, ve rung, va dung

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 (hoc hien)) xanh - hanh trinh ve dung cong ((van toan) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - hanh trinh ve dung cong ((van toan) OR (van tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - hanh trinh ve dung cong ((van toan) or (van tuan)) cao*.