Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh van » thanh van, khanh van, hanh san
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
hanh va » hang va, hanh vi
cua te » cua tu
x hoi » xa hoi, o hoi, 5 hoi

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) OR (x ho)). hieu van cam duc va ((hanh va) or (hanh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (x ho)). hieu van cam duc va ((hanh va) OR (hanh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((x hoi) OR (x ho)). hieu van cam duc va ((hanh va) or (hanh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (x ho)). hieu van cam duc va ((hanh va) or (hanh van)) cua te*.