Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cac thuc » cach thuc, cac thu, can thuc
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((su sach) or (vu bach))) or (hoc sach)) ky nang xa hoi. hieu va cac thuc van hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (vu bach))) OR (hoc sach)) ky nang xa hoi. hieu va cac thuc van hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: ((((su sach) or (vu bach))) or (hoc sach)) ky nang xa hoi. hieu va cac thuc van hanh vai cua tu*.