Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu ca » hieu cac, hieu cua, hieu va
luc van » luoc van, duc van, luc va
luu van » cuu van, luan van, luu hanh
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
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: tu sach y nang ma hoi. hieu ca nhan ((luc van) or (luu van)) hanh vi ((cua triet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ca nhan ((luc van) OR (luu van)) hanh vi ((cua triet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ca nhan ((luc van) or (luu van)) hanh vi ((cua triet) or (ca viet))*.