Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
danh van » doanh van, dang van, dinh van
cau treo » cau theo, cau tren, cau triet
toc sac » toc sach, toc san, doc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
van cau » van dau, van hau, van chat
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) or (hoc sach)) ky nang xa hoi. hieu ve cau tao va danh van cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (hoc sach)) ky nang xa hoi. hieu ve cau tao va danh van cau treo.
• Adding a wildcard symbol may retrieve word variants: ((toc sac) or (hoc sach)) ky nang xa hoi. hieu ve cau tao va danh van cau treo*.