Perhaps you should try some spelling variations:
thanh do » thanh pho, thanh hoa, thanh loi
thanh de » hanh de, thanh ve, thanh le
vu sach » vu bach, su sach, vu khach
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach ty
he nam » ha nam, nghe nam
ve nam » va nam, le nam, 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: vu sach tu nang xa hoi. hieu ((ve nam) OR (he nam)) thuc hanh ((thanh de) or (thanh do)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu nang xa hoi. hieu ((ve nam) OR (he nam)) thuc hanh ((thanh de) OR (thanh do)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu nang xa hoi. hieu ((ve nam) OR (he nam)) thuc hanh ((thanh de) or (thanh do)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach tu nang xa hoi. hieu ((ve nam) OR (he nam)) thuc hanh ((thanh de) or (thanh do)) cua te*.