Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » thien van, hieu ve
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
nuoc ca » nuoc cua, nuoc cap, nuoc va
dan vat » dang vat, van vat, dan va
vat cua » mat cua, bat cua, dat cua
cua tre » cua te, cuu tre, cua triet
ca dan » cac dan, ca dao

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 ty nang xa hoi. ((((hieu van) or (hieu va))) or (lieu va)) hoc nuoc ca dan vat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang xa hoi. ((((hieu van) OR (hieu va))) OR (lieu va)) hoc nuoc ca dan vat cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang xa hoi. ((((hieu van) or (hieu va))) or (lieu va)) hoc nuoc ca dan vat cua tre*.