Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
van cao » van dao, van bao, van hao
cao suc » cao su, cao duc
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) or (su sach)) ky nang x hoi. hieu van cao suc manh thanh tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu van cao suc manh thanh tai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu van cao suc manh thanh tai ((dua tren) or (cua te))*.