Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach tu, sach thu
kinh vi » dinh vi, kinh ve, kenh vi
va kinh » va tinh, qua kinh
te sach » toc sach
cac hoc » cach hoc, cac hop, bac hoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cac toc » cac toi, cac nuoc, cac thoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu va ((cac hoc) or (cac toc)) va kinh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va ((cac hoc) OR (cac toc)) va kinh vi ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va ((cac hoc) or (cac toc)) va kinh vi ((cua triet) OR (va triet))*".