Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
huong doi » huong dan, trong doi, dung doi
va huong » va thuong, va phuong, va tuong
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (nuoc sach)) ky nang xa hoi. ((hieu va) or (hieu qua)) cac tu va huong doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ky nang xa hoi. ((hieu va) OR (hieu qua)) cac tu va huong doi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) ky nang xa hoi. ((hieu va) or (hieu qua)) cac tu va huong doi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (nuoc sach)) ky nang xa hoi. ((hieu va) or (hieu qua)) cac tu va huong doi cuu tre*.