Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
tan toan » tan tran, tap toan, van toan
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 thieu) or (theo tieu)) xanh - hanh tranh va ((thong cong) or (dung cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (theo tieu)) xanh - hanh tranh va ((thong cong) OR (dung cong)) tan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo tieu)) xanh - hanh tranh va ((thong cong) or (dung cong)) tan toan ban*.