Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cau luc » cau truc, cau phuc
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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

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