Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van tuan » van quan, van ban, anh tuan
tuan san » luan san, tan san, thanh san
dua tren » dung tren
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
co xuc » co xuoc, co xua
x hoi » xa hoi, o hoi, x ho
va co » vo co

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 x hoi. hieu va co xuc van tuan san ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu va co xuc van tuan san ((dua tren) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu va co xuc van tuan san ((dua tren) or (cua triet))*.