Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
hang tai » hang va, dung tai
nhan tai » van tai, toan tai
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
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 (doc sach)) ky nang xa hoi. thien van cau duc anh ((nhan tai) or (hang tai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang xa hoi. thien van cau duc anh ((nhan tai) OR (hang tai)) cua tu.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky nang xa hoi. thien van cau duc anh ((nhan tai) or (hang tai)) cua tu*.