Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hac truc » hoc truc, hang truc, sach truc
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
van hac » van hoc, van ha, van hai
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
dan vi » doan vi, don vi, dan va
va dan » ca dan, va dao, va dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu van hac truc va dan vi ((cua tre) or (((cuu tre) OR (cau treo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van hac truc va dan vi ((cua tre) OR (((cuu tre) OR (cau treo)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van hac truc va dan vi ((cua tre) or (((cuu tre) OR (cau treo))))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van hac truc va dan vi ((cua tre) or (((cuu tre) OR (cau treo))))*.