Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
hanh trinh » hanh chinh
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
lang cong » dang cong, bang cong, hang cong
thanh tap » thanh lap, thanh tai, thanh tay
vat lang » va lang, van lang, vat mang

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 (doi chieu)) xanh - ((hanh trinh) OR (canh tranh)) vat lang cong ngang thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) xanh - ((hanh trinh) OR (canh tranh)) vat lang cong ngang thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chieu)) xanh - ((hanh trinh) OR (canh tranh)) vat lang cong ngang thanh tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - ((hanh trinh) OR (canh tranh)) vat lang cong ngang thanh tap*.