Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
nang mai » nang ma, nang tai, lang mai
mai khoa » tai khoa, may khoa, dai khoa
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
bo sach » co sach, hoc sach
hieu ve » hieu va
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach vuc nang mai khoa. ((hieu ve) or (hieu van)) nam thuc va thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach vuc nang mai khoa. ((hieu ve) OR (hieu van)) nam thuc va thanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: bo sach vuc nang mai khoa. ((hieu ve) or (hieu van)) nam thuc va thanh vai cua viet*.