Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thu sach » tu sach, thuat sach, thu hoach
hoc sach » hoc sinh, hoc cac, hoc anh
cac thuc » cach thuc, cac thu, can thuc
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
dan den » ban den, van den, dan dung
den cua » dien cua, de cua, ben cua
cua tre » cua te, cuu tre, cua triet
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: ((thu sach) or (((thuoc sach) OR (hoc sach)))) ky nang xa hoi. lieu va cac thuc va dan den cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((thuoc sach) OR (hoc sach)))) ky nang xa hoi. lieu va cac thuc va dan den cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((thuoc sach) OR (hoc sach)))) ky nang xa hoi. lieu va cac thuc va dan den cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((thuoc sach) OR (hoc sach)))) ky nang xa hoi. lieu va cac thuc va dan den cua tre*.