Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cua cau » cua cac, cua chu, cua cay
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam
cua te » cua tu
tuc va » thuc va, truc va, duc va
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 ty nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh hai ((cua te) or (cua cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh hai ((cua te) OR (cua cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh hai ((cua te) or (cua cau))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh hai ((cua te) or (cua cau))*.