Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dinh hai » dinh thai, tinh hai, dinh ha
hai cua » thai cua, dai cua, hoi cua
thuc va » thuc vat, thuc dan, thuc day
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach ty » sach tu, sach thu, xach tay
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » truc va, tuc xa, duc va
ve cam » ve cham, ve cac, va cam

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) or (sach ty)) nang ma hoi. hieu ve cam ((tuc va) OR (thuc va)) dinh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) nang ma hoi. hieu ve cam ((tuc va) OR (thuc va)) dinh hai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach y) or (sach ty)) nang ma hoi. hieu ve cam ((tuc va) OR (thuc va)) dinh hai cua viet*".