Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
suc xanh » suc manh, suc canh, tuoc xanh
van cao » van dao, van bao, van hao
mai hoi » mai khoi, dai hoi, lai hoi
cao suc » cao su, cao duc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang ((ma hoi) OR (mai hoi)). hieu van cao suc xanh hanh tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ((ma hoi) OR (mai hoi)). hieu van cao suc xanh hanh tai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang ((ma hoi) OR (mai hoi)). hieu van cao suc xanh hanh tai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((ma hoi) OR (mai hoi)). hieu van cao suc xanh hanh tai ((dua tren) or (cua te))*.