Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
chat luc » chat xuc, chat lua, nhan luc
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
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) or (thu sach)) y nang xa hoi. hieu van chat luc van hanh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) y nang xa hoi. hieu van chat luc van hanh vi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) y nang xa hoi. hieu van chat luc van hanh vi ((cua tre) or (su triet))*.