Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu ca » hieu cac, hieu cua, hieu va
duc van » duc va, duc tan, duc manh
luu van » cuu van, luan van, luu hanh
co viet » so viet, o viet, hoc viet

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 ly nang xa hoi. hieu ca nhan ((duc van) or (luu van)) hanh vi ((cua triet) or (co viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. hieu ca nhan ((duc van) OR (luu van)) hanh vi ((cua triet) OR (co viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. hieu ca nhan ((duc van) or (luu van)) hanh vi ((cua triet) or (co viet))*.