Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh loi » thanh hoa, thanh hai, thanh lap
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
sach v » sach va, sach y, sach 2
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang

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 v nang xa hoi. hieu ve cam duc van ((thanh loi) or (dung tai)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang xa hoi. hieu ve cam duc van ((thanh loi) OR (dung tai)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. hieu ve cam duc van ((thanh loi) or (dung tai)) ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu ve cam duc van ((thanh loi) or (dung tai)) ((cua tre) OR (cua triet))*.