Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cao suc » cao su, cao duc
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
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 sach) OR (thu sach)) ly nang xa hoi. hieu ve ((pham duc) or (cao suc)) van thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang xa hoi. hieu ve ((pham duc) OR (cao suc)) van thanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly nang xa hoi. hieu ve ((pham duc) or (cao suc)) van thanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly nang xa hoi. hieu ve ((pham duc) or (cao suc)) van thanh tai cua te*.