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