Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu
tranh van » tran van, trinh van, thanh van
cong vang » cong lang, cong quang, cong ngang
van dung » van dong, xay dung, tin dung
cong van » cong san, song van, cong tan
toan ban » van ban

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

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