Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc 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 ve » hieu va, hieu van
tinh va » tich va, trinh van, trinh vat
ve cao » va cao, ve bao, ve cac
tuc va » thuc va, truc va, duc va
va cua » va chua, via cua, ca cua
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: thu sach ty nang xa hoi. hieu ve cao ((tuc va) OR (tuc xa)) tinh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. hieu ve cao ((tuc va) OR (tuc xa)) tinh va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu ve cao ((tuc va) OR (tuc xa)) tinh va cua te*.