Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
can hanh » ban hanh, van hanh, dan hanh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau hoc » cau hoi, cau hoa, cao hoc
hoc can » hoc dan, hoc cao, hoc cac
ve cau » ke cau, va cau, ve cac
vi cua » vai cua, di cua
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: ((te sach) or (toc sach)) ky nang xa hoi. hieu ve cau hoc can hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang xa hoi. hieu ve cau hoc can hanh vi cua tu*.