Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
hanh va » hang va, hanh vi
va cau » van cau, va cac, 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 hoach) or (thuoc sach)) ty nang xa hoi. lieu va cham soc van hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuoc sach)) ty nang xa hoi. lieu va cham soc van hanh va cau tren.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuoc sach)) ty nang xa hoi. lieu va cham soc van hanh va cau tren*.