Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cuc ban » cac ban, duc ban, coc ban
cuu ban » cuu van, cuu san, cuu nang
va cam » va cham, va cac, va cao
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: te sach ty nang xa hoi. hieu va cam ((((cuc ban) OR (cua ban))) or (cuu ban)) thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va cam ((((cuc ban) OR (cua ban))) OR (cuu ban)) thanh dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va cam ((((cuc ban) OR (cua ban))) or (cuu ban)) thanh dai cua te*".