Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
hang tai » hang va, dung tai
duc manh » duc anh, duc minh, duc tan
nhan tai » van tai, toan tai
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thien van cau ((duc manh) or (suc manh)) ((nhan tai) OR (hang tai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. thien van cau ((duc manh) OR (suc manh)) ((nhan tai) OR (hang tai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. thien van cau ((duc manh) or (suc manh)) ((nhan tai) OR (hang tai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thien van cau ((duc manh) or (suc manh)) ((nhan tai) OR (hang tai)) cua tu*.