Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
phuc va » phuc vu, chuc va, thuc vat
thuc va » thuc vat, thuc dan, thuc day
ca tren » cau tren, cu tren, la tren
ve cau » ke cau, va cau, ve cac
dan va » doan va, dan ca, ban va
va ca » va cac, va cao, va cai

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 ky nang xa hoi. hieu ve cau ((phuc va) OR (thuc va)) dan va ca tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang xa hoi. hieu ve cau ((phuc va) OR (thuc va)) dan va ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. hieu ve cau ((phuc va) OR (thuc va)) dan va ca tren*.