Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
thu sach » tu sach, thuat sach, thuoc sach
duc manh » suc manh, duc anh, duc minh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc may » duc mau, duc man, dung may
van cua » vang cua, ban cua, dan cua
ve dao » de dao, va dao, ve 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 hoi. hieu ve dao ((duc may) OR (duc manh)) trinh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ve dao ((duc may) OR (duc manh)) trinh van cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve dao ((duc may) OR (duc manh)) trinh van cua te*.