Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
nang cam » nang cham, nang cao, nang cap
ty nang » ky nang, ty hang, ly nang
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
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: thu sach ((ty nang) OR (ty xang)) xa hoi. thi nang cam ((xuc va) or (thuc dan)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) xa hoi. thi nang cam ((xuc va) OR (thuc dan)) hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ty xang)) xa hoi. thi nang cam ((xuc va) or (thuc dan)) hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ty xang)) xa hoi. thi nang cam ((xuc va) or (thuc dan)) hanh vai cuu tre*.