Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
cua duc » cua tuc, cua nuoc, cua quoc
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, may nang
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) mai hoi. hieu ve cam xuc van thanh vi ((cua duc) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) mai hoi. hieu ve cam xuc van thanh vi ((cua duc) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) mai hoi. hieu ve cam xuc van thanh vi ((cua duc) or (cua cu))".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) mai hoi. hieu ve cam xuc van thanh vi ((cua duc) or (cua cu))*.