Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
trung va » truong va, trang va, trung ha
ca viet » va viet, co viet, hoa viet
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat
hai ca » hai cua, hai ba, bai ca
sinh v » sinh va, sinh y, sinh vat
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: cho sinh v ((nang ma) or (tang ma)) hoi. hieu ve cam ((truc va) or (trung va)) hanh hai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho sinh v ((nang ma) OR (tang ma)) hoi. hieu ve cam ((truc va) OR (trung va)) hanh hai ca viet.
• Adding a wildcard symbol may retrieve word variants: cho sinh v ((nang ma) or (tang ma)) hoi. hieu ve cam ((truc va) or (trung va)) hanh hai ca viet*.