Perhaps you should try some spelling variations:
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cac xuc » cam xuc, cac nuoc, chat xuc
dau thi » cau thi, dan thi, dao thi
cuu tre » cua tre
xuc va » duc va, tuc va, luc va
va dau » va dao
x hoi » xa hoi, o hoi, x ho

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