Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh tai » thanh toan, doanh tai, thanh san
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cao suc » cao su
sach ky » sac ky, sach y, sach ty
cao duc » dao duc, giao duc, tao duoc
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: su sach ky nang x hoi. hieu van ((cao suc) or (cao duc)) va ((thanh tai) OR (thanh hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van ((cao suc) OR (cao duc)) va ((thanh tai) OR (thanh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu van ((cao suc) or (cao duc)) va ((thanh tai) OR (thanh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van ((cao suc) or (cao duc)) va ((thanh tai) OR (thanh hai)) cua te*.