Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
may trinh » may tinh, lap trinh, quy trinh
thu sach » tu sach, thuat sach, thuoc sach
bao duoc » tao duoc, ban duoc, bo duoc
duoc may » duoc ma, duoc ly, hoc may
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, mang xa, ang xa
van cua » vang cua, ban cua, dan cua
ve bao » te bao, va bao
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: thu sach ky ((((nang xa) OR (nang ma))) or (lang xa)) hoi. hieu ve bao duoc may trinh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((((nang xa) OR (nang ma))) OR (lang xa)) hoi. hieu ve bao duoc may trinh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((((nang xa) OR (nang ma))) or (lang xa)) hoi. hieu ve bao duoc may trinh van cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((((nang xa) OR (nang ma))) or (lang xa)) hoi. hieu ve bao duoc may trinh van cua te*.