Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lai » thanh hai, thanh lap, thanh loi
su sach » so sach, vu sach
su viet » so viet
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
xuc ha » vuc ha, duc ha, luc ha
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu va chat ((xuc ha) OR (xuc hay)) thanh lai ((cua triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va chat ((xuc ha) OR (xuc hay)) thanh lai ((cua triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va chat ((xuc ha) OR (xuc hay)) thanh lai ((cua triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu va chat ((xuc ha) OR (xuc hay)) thanh lai ((cua triet) or (su viet))*.