Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va thanh » gia thanh, ban thanh, va tinh
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
ve cham » va cham, ve chat, vu cham
san cua » sang cua, ban cua, dan cua
thuc va » thuc vat, thuc dan, thuc day
bo sach » co sach, hoc sach
hoc cac » hoc cao
vu nang » vuc nang, va nang, vu dang
ve cam » ve cac, va cam, ve cai

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) or (hoc cac)) vu nang mai khoi. hieu ((ve cam) OR (ve cham)) thuc va thanh san cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc cac)) vu nang mai khoi. hieu ((ve cam) OR (ve cham)) thuc va thanh san cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (hoc cac)) vu nang mai khoi. hieu ((ve cam) OR (ve cham)) thuc va thanh san cua viet".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (hoc cac)) vu nang mai khoi. hieu ((ve cam) OR (ve cham)) thuc va thanh san cua viet*.