Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hoc sach » hoc cac, hoc anh
cham sat » cham mat, cham soc, khao sat
van hanh » van thanh, ban hanh, van anh
cac tren » ca tren, cau tren, rac tren
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sat van » sat va, hat van, hoat van
hanh va » hang va, hanh vi

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 (((hoc sach) or (hoc sinh)))) ty nang xa hoi. hieu va cham sat van hanh va cac tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((hoc sach) OR (hoc sinh)))) ty nang xa hoi. hieu va cham sat van hanh va cac tren.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((hoc sach) or (hoc sinh)))) ty nang xa hoi. hieu va cham sat van hanh va cac tren*.