Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
bo sach » co sach, hoc sach
doi cua » dai cua, hoi cua
mang xa » lang xa, mang may, dang xay
sach v » sach va, sach y, sach 2
le nam » he nam, le na, te nam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach v ((mang xa) or (nang x)) hoi. hieu ((le nam) OR (ly nam)) thuc van hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach v ((mang xa) OR (nang x)) hoi. hieu ((le nam) OR (ly nam)) thuc van hanh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach v ((mang xa) or (nang x)) hoi. hieu ((le nam) OR (ly nam)) thuc van hanh doi cua te".
• Adding a wildcard symbol may retrieve word variants: bo sach v ((mang xa) or (nang x)) hoi. hieu ((le nam) OR (ly nam)) thuc van hanh doi cua te*.