Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hoc thieu » toc thieu, hoc hien
cong nang » cong ngang, cong nong, cong vang
cong lang » cong vang, cong luong, cong quang
doc hieu » toc thieu, hoc hien
tuong va » truong va, thuong va, luong va
thanh tu » hanh tu, nhanh tu, thanh tung
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc thieu)) xanh - thanh tuong va bang ((cong nang) OR (cong lang)) thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - thanh tuong va bang ((cong nang) OR (cong lang)) thanh tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) xanh - thanh tuong va bang ((cong nang) OR (cong lang)) thanh tu".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - thanh tuong va bang ((cong nang) OR (cong lang)) thanh tu*.