Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac
cau treo » cau theo, cau tren, cau triet
hoc anh » hoc nganh, hoc nhanh, ngoc anh
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
va nam » ha nam, va nay
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) OR (hoc anh)) ky nang xa hoi. hieu ((va nam) or (van nam)) thuc va dan vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc anh)) ky nang xa hoi. hieu ((va nam) OR (van nam)) thuc va dan vai cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc anh)) ky nang xa hoi. hieu ((va nam) or (van nam)) thuc va dan vai cau treo".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc anh)) ky nang xa hoi. hieu ((va nam) or (van nam)) thuc va dan vai cau treo*.