Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren
dau thi » cau thi, dan thi, dao thi
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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. lieu va cac ((xuc va) OR (tuc va)) dau thi ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. lieu va cac ((xuc va) OR (tuc va)) dau thi ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. lieu va cac ((xuc va) OR (tuc va)) dau thi ((cuu tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. lieu va cac ((xuc va) OR (tuc va)) dau thi ((cuu tre) or (cau treo))*.