Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dat tren » dat trong, dua tren
cao tuc » dao tuc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa
de dat » de dao
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (thuoc sach)) ky nang ((x hoi) or (xa hoi)). lieu va cao tuc va hanh de dat tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuoc sach)) ky nang ((x hoi) OR (xa hoi)). lieu va cao tuc va hanh de dat tren.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuoc sach)) ky nang ((x hoi) or (xa hoi)). lieu va cao tuc va hanh de dat tren*.