Perhaps you should try some spelling variations:
thien van » thi van
toc sach » doc sach, thuoc sach, nuoc sach
duc manh » suc manh, duc anh, duc tan
hoc sach » hoc sinh, hoc cac, hoc anh
nhan tai » hang tai, van tai, toan tai
duc minh » duc anh
tai cua » thai cua, tai cuc, tri cua
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
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) or (hoc sach)) ky nang xa hoi. thien van cau ((duc manh) OR (duc minh)) nhan tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. thien van cau ((duc manh) OR (duc minh)) nhan tai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang xa hoi. thien van cau ((duc manh) OR (duc minh)) nhan tai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang xa hoi. thien van cau ((duc manh) OR (duc minh)) nhan tai cua tu*.