Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, hoi cua
va cao » va co, va dao, va bao
xuc va » duc va, tuc va, luc va

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 ty nang xa hoi. hieu ((va cac) or (va cao)) xuc va danh ((hai cua) or (tai cuc)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu ((va cac) OR (va cao)) xuc va danh ((hai cua) OR (tai cuc)) vat.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ((va cac) or (va cao)) xuc va danh ((hai cua) or (tai cuc)) vat*.