Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
mang xa » mang may, dang xay, mang cua
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 sach ty ((((mang xa) or (nang ma))) or (lang xa)) hoi. hieu van cau tuc va hanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((((mang xa) OR (nang ma))) OR (lang xa)) hoi. hieu van cau tuc va hanh dai cua vat*.