Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
cham luc » cham soc, nhan luc, cham cuu
su sach » so sach, vu sach
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
co sach » bo sach, cuon sach, hoc sach
luc va » duc va, tuc va, loc 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) or (co sach)) ty nang xa hoi. ((hieu va) OR (hieu qua)) cham luc va thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ty nang xa hoi. ((hieu va) OR (hieu qua)) cham luc va thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ty nang xa hoi. ((hieu va) OR (hieu qua)) cham luc va thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ty nang xa hoi. ((hieu va) OR (hieu qua)) cham luc va thanh vai cuu tre*.