Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
vuc nang » cuc nang, vu nang, chuc nang
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
qua cau » quan cau, qua cac, qua ca
truc va » thuc va, thuc vat, trung va
vai cua » dai cua, hai cua, lai cua
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, xa hoi, ma hoa

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 ((v nang) or (vuc nang)) ma hoi. hieu qua cau truc va thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((v nang) OR (vuc nang)) ma hoi. hieu qua cau truc va thanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ((v nang) or (vuc nang)) ma hoi. hieu qua cau truc va thanh vai cua viet*.