Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam, va nay
vu cua » hu cua, tu cua
dan va » doan va, dan ca, ban va
tu ca » tu cac, tu cua, tu can
va ve » va de, va le, va vi

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 xa hoi. hieu va nam ((tu ca) or (vu cua)) dan va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va nam ((tu ca) OR (vu cua)) dan va ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va nam ((tu ca) or (vu cua)) dan va ve triet*.