Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
khoa bien » hoa bien, khoa tieng, khoa dieu
bien nang » bien nong, bien dang, dien nang
hoa huyen » hoi huyen, hoa truyen, hong huyen
hoa hien » hoc hien, hoa bien, hoa thiet
danh bac » doanh bac, danh bat, dang bac
danh tac » doanh tai, danh thuc, danh tu
canh tac » canh tay, canh giac, cong tac
bien nay » hien nay, bien ngau, bien va
dan bac » dan ba, van bac, dong bac
va hoan » van hoan, va hoa, va hoat
bac va » ban va, bac ha, bao va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( danh tac da khoa bien nang ) or ( canh tac da khoa bien nay ))) or ((( dan bac va hoan thien nang ) or ( danh bac va ((hoa hien) or (hoa huyen)) dai ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( danh tac da khoa bien nang ) OR ( canh tac da khoa bien nay ))) OR ((( dan bac va hoan thien nang ) OR ( danh bac va ((hoa hien) OR (hoa huyen)) dai )))).
• Adding a wildcard symbol may retrieve word variants: (((( danh tac da khoa bien nang ) or ( canh tac da khoa bien nay ))) or ((( dan bac va hoan thien nang ) or ( danh bac va ((hoa hien) or (hoa huyen)) dai ))))*.