Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh tai » thanh hai, doanh tai, thanh san
tu sach » thu sach, su sach, te sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
ve cao » va cao, ve bao, ve cac
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 (so sach)) ky nang xa hoi. hieu ve cao duc va ((thanh tai) OR (thanh toan)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky nang xa hoi. hieu ve cao duc va ((thanh tai) OR (thanh toan)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ky nang xa hoi. hieu ve cao duc va ((thanh tai) OR (thanh toan)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang xa hoi. hieu ve cao duc va ((thanh tai) OR (thanh toan)) cua te*.