Perhaps you should try some spelling variations:
xang xay » dang xay, van xay, xang dau
vanh dai » van dai, vanh tai, lanh dao
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xay hoi » xa hoi, tay hoi, cay phoi
ve chim » va chim, ve cham, ve chinh
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
va vanh » va van, va danh, va hanh
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty xang xay hoi. hieu ((ve chim) or (va cham)) truc va vanh dai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang xay hoi. hieu ((ve chim) OR (va cham)) truc va vanh dai va trien.
• Adding a wildcard symbol may retrieve word variants: te sach ty xang xay hoi. hieu ((ve chim) or (va cham)) truc va vanh dai va trien*.