Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cay phoi » cap phoi, tay hoi, cay cho
sinh dai » sinh thai, si dai, sinh vat
minh dai » minh dao, minh hai, minh ai
hieu van » hieu va, thien van, lieu va
dang cay » dang xay, dang ca, dang cac
ky dang » ky nang, ky danh
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
te sach » toc sach
tu cach » tu cac
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky dang cay phoi. hieu van cam tuc va ((minh dai) OR (sinh dai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky dang cay phoi. hieu van cam tuc va ((minh dai) OR (sinh dai)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky dang cay phoi. hieu van cam tuc va ((minh dai) OR (sinh dai)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky dang cay phoi. hieu van cam tuc va ((minh dai) OR (sinh dai)) cua viet*.