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