Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
dua tren » dung tren
dung ban » dung san, dung dan, dong ban
tu sach » thu sach, su sach, te sach
ve canh » van canh, ve thanh
sach ky » sac ky, sach y, sach ty
ve cach » va cach, ve cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. hieu ((ve cach) OR (ve canh)) dung ban thanh hai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((ve cach) OR (ve canh)) dung ban thanh hai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((ve cach) OR (ve canh)) dung ban thanh hai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cach) OR (ve canh)) dung ban thanh hai ((dua tren) or (cua te))*.