Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
mai khoi » mai khoa, tai khoa, cac khoi
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
cua duc » cua tuc, cua nuoc, cua quoc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
mai hoi » dai hoi, lai hoi, mai doi
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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 ky nang ((mai hoi) or (mai khoi)). hieu va cam xuc van thanh vi ((cua duc) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai hoi) OR (mai khoi)). hieu va cam xuc van thanh vi ((cua duc) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai hoi) or (mai khoi)). hieu va cam xuc van thanh vi ((cua duc) or (cua tu))*.