Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cua khong » hua khong, cua phuong, cua thuong
thong va » thong cua, truong va, thong qua
than cao » toan cao, thai cao, than cap
va than » va thanh, van than, va phan

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 xanh - ((((thanh trung) OR (thanh tung))) or (canh tranh)) cua khong thong va than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((((thanh trung) OR (thanh tung))) OR (canh tranh)) cua khong thong va than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((((thanh trung) OR (thanh tung))) or (canh tranh)) cua khong thong va than cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((((thanh trung) OR (thanh tung))) or (canh tranh)) cua khong thong va than cao*.