Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
xa thanh » va thanh, ha thanh, ta thanh
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
ma hoi » mai hoi, xa hoi, ma hoa
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: ((so sach) or (bo sach)) ky nang ma hoi. lieu va ((cac tuc) OR (cac toc)) xa thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky nang ma hoi. lieu va ((cac tuc) OR (cac toc)) xa thanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ky nang ma hoi. lieu va ((cac tuc) OR (cac toc)) xa thanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ky nang ma hoi. lieu va ((cac tuc) OR (cac toc)) xa thanh dai cua te*.